Finding the Fourth Proportional to 99,061,259.20, 136,704,966.96 and 55,008,123.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,061,259.20 : 136,704,966.96 = 55,008,123.28 : x
2. Step 2: Convert to fraction form
   99,061,259.20/136,704,966.96 = 55,008,123.28/x
3. Step 3: Cross multiply
   99,061,259.20x = 136,704,966.96 × 55,008,123.28
4. Step 4: Simplify right side
   99,061,259.20x = 7,519,883,675,524,007
5. Step 5: Solve for x
   x = 7,519,883,675,524,007/99,061,259.20
6. Step 6: Final answer
   x = 75,911,448.49