Finding the Fourth Proportional to 19,387,113,992.78, 29,039,945,912.64 and 12,300,949,351.76

Step by Step Solution

1. Step 1: Write the proportion equation
   19,387,113,992.78 : 29,039,945,912.64 = 12,300,949,351.76 : x
2. Step 2: Convert to fraction form
   19,387,113,992.78/29,039,945,912.64 = 12,300,949,351.76/x
3. Step 3: Cross multiply
   19,387,113,992.78x = 29,039,945,912.64 × 12,300,949,351.76
4. Step 4: Simplify right side
   19,387,113,992.78x = 357,218,903,849,089,236,992
5. Step 5: Solve for x
   x = 357,218,903,849,089,236,992/19,387,113,992.78
6. Step 6: Final answer
   x = 18,425,584,333.09