Finding the Fourth Proportional to 99,445.59, 137,224.53 and 56,411.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,445.59 : 137,224.53 = 56,411.34 : x
2. Step 2: Convert to fraction form
   99,445.59/137,224.53 = 56,411.34/x
3. Step 3: Cross multiply
   99,445.59x = 137,224.53 × 56,411.34
4. Step 4: Simplify right side
   99,445.59x = 7,741,019,618.17
5. Step 5: Solve for x
   x = 7,741,019,618.17/99,445.59
6. Step 6: Final answer
   x = 77,841.76