Finding the Fourth Proportional to 138,411.32, 207,639.35 and 58,461.31

Step by Step Solution

1. Step 1: Write the proportion equation
   138,411.32 : 207,639.35 = 58,461.31 : x
2. Step 2: Convert to fraction form
   138,411.32/207,639.35 = 58,461.31/x
3. Step 3: Cross multiply
   138,411.32x = 207,639.35 × 58,461.31
4. Step 4: Simplify right side
   138,411.32x = 12,138,868,595.02
5. Step 5: Solve for x
   x = 12,138,868,595.02/138,411.32
6. Step 6: Final answer
   x = 87,701.41