Finding the Fourth Proportional to 99,386.18, 137,150.46 and 56,941.97

Step by Step Solution

1. Step 1: Write the proportion equation
   99,386.18 : 137,150.46 = 56,941.97 : x
2. Step 2: Convert to fraction form
   99,386.18/137,150.46 = 56,941.97/x
3. Step 3: Cross multiply
   99,386.18x = 137,150.46 × 56,941.97
4. Step 4: Simplify right side
   99,386.18x = 7,809,616,693.05
5. Step 5: Solve for x
   x = 7,809,616,693.05/99,386.18
6. Step 6: Final answer
   x = 78,578.50