Finding the Fourth Proportional to 123,721.50, 185,927.85 and 115,755.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,721.50 : 185,927.85 = 115,755.42 : x
2. Step 2: Convert to fraction form
   123,721.50/185,927.85 = 115,755.42/x
3. Step 3: Cross multiply
   123,721.50x = 185,927.85 × 115,755.42
4. Step 4: Simplify right side
   123,721.50x = 21,522,156,366.45
5. Step 5: Solve for x
   x = 21,522,156,366.45/123,721.50
6. Step 6: Final answer
   x = 173,956.48