Finding the Fourth Proportional to 12,900,411.76, 17,802,337.98 and 7,019,845.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900,411.76 : 17,802,337.98 = 7,019,845.36 : x
2. Step 2: Convert to fraction form
   12,900,411.76/17,802,337.98 = 7,019,845.36/x
3. Step 3: Cross multiply
   12,900,411.76x = 17,802,337.98 × 7,019,845.36
4. Step 4: Simplify right side
   12,900,411.76x = 124,969,659,666,054.78
5. Step 5: Solve for x
   x = 124,969,659,666,054.78/12,900,411.76
6. Step 6: Final answer
   x = 9,687,261.31