Finding the Fourth Proportional to 439,123.77, 658,686.06 and 123,580.98

Step by Step Solution

1. Step 1: Write the proportion equation
   439,123.77 : 658,686.06 = 123,580.98 : x
2. Step 2: Convert to fraction form
   439,123.77/658,686.06 = 123,580.98/x
3. Step 3: Cross multiply
   439,123.77x = 658,686.06 × 123,580.98
4. Step 4: Simplify right side
   439,123.77x = 81,401,068,807.14
5. Step 5: Solve for x
   x = 81,401,068,807.14/439,123.77
6. Step 6: Final answer
   x = 185,371.58