Finding the Fourth Proportional to 99,810,591.56, 137,730,928.98 and 56,354,816.84

Step by Step Solution

1. Step 1: Write the proportion equation
   99,810,591.56 : 137,730,928.98 = 56,354,816.84 : x
2. Step 2: Convert to fraction form
   99,810,591.56/137,730,928.98 = 56,354,816.84/x
3. Step 3: Cross multiply
   99,810,591.56x = 137,730,928.98 × 56,354,816.84
4. Step 4: Simplify right side
   99,810,591.56x = 7,761,801,275,870,948
5. Step 5: Solve for x
   x = 7,761,801,275,870,948/99,810,591.56
6. Step 6: Final answer
   x = 77,765,306.81