Finding the Fourth Proportional to 138,466.43, 207,610.89 and 58,482.72

Step by Step Solution

1. Step 1: Write the proportion equation
   138,466.43 : 207,610.89 = 58,482.72 : x
2. Step 2: Convert to fraction form
   138,466.43/207,610.89 = 58,482.72/x
3. Step 3: Cross multiply
   138,466.43x = 207,610.89 × 58,482.72
4. Step 4: Simplify right side
   138,466.43x = 12,141,649,548.82
5. Step 5: Solve for x
   x = 12,141,649,548.82/138,466.43
6. Step 6: Final answer
   x = 87,686.60