Finding the Fourth Proportional to 99,628.53, 137,490.89 and 56,607.41

Step by Step Solution

1. Step 1: Write the proportion equation
   99,628.53 : 137,490.89 = 56,607.41 : x
2. Step 2: Convert to fraction form
   99,628.53/137,490.89 = 56,607.41/x
3. Step 3: Cross multiply
   99,628.53x = 137,490.89 × 56,607.41
4. Step 4: Simplify right side
   99,628.53x = 7,783,002,211.00
5. Step 5: Solve for x
   x = 7,783,002,211.00/99,628.53
6. Step 6: Final answer
   x = 78,120.22