Finding the Fourth Proportional to 123,407.35, 185,129.13 and 39,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,407.35 : 185,129.13 = 39,139.42 : x
2. Step 2: Convert to fraction form
   123,407.35/185,129.13 = 39,139.42/x
3. Step 3: Cross multiply
   123,407.35x = 185,129.13 × 39,139.42
4. Step 4: Simplify right side
   123,407.35x = 7,245,846,773.30
5. Step 5: Solve for x
   x = 7,245,846,773.30/123,407.35
6. Step 6: Final answer
   x = 58,714.87