Finding the Fourth Proportional to 19,499,903.76, 26,918,557.89 and 12,888,474.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,499,903.76 : 26,918,557.89 = 12,888,474.31 : x
2. Step 2: Convert to fraction form
   19,499,903.76/26,918,557.89 = 12,888,474.31/x
3. Step 3: Cross multiply
   19,499,903.76x = 26,918,557.89 × 12,888,474.31
4. Step 4: Simplify right side
   19,499,903.76x = 346,939,141,827,512.81
5. Step 5: Solve for x
   x = 346,939,141,827,512.81/19,499,903.76
6. Step 6: Final answer
   x = 17,791,838.67