Finding the Fourth Proportional to 137,977.20, 206,792.72 and 58,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   137,977.20 : 206,792.72 = 58,998.72 : x
2. Step 2: Convert to fraction form
   137,977.20/206,792.72 = 58,998.72/x
3. Step 3: Cross multiply
   137,977.20x = 206,792.72 × 58,998.72
4. Step 4: Simplify right side
   137,977.20x = 12,200,505,785.32
5. Step 5: Solve for x
   x = 12,200,505,785.32/137,977.20
6. Step 6: Final answer
   x = 88,424.07