Finding the Fourth Proportional to 123,876.45, 171,020.43 and 81,558

Step by Step Solution

1. Step 1: Write the proportion equation
   123,876.45 : 171,020.43 = 81,558 : x
2. Step 2: Convert to fraction form
   123,876.45/171,020.43 = 81,558/x
3. Step 3: Cross multiply
   123,876.45x = 171,020.43 × 81,558
4. Step 4: Simplify right side
   123,876.45x = 13,948,084,229.94
5. Step 5: Solve for x
   x = 13,948,084,229.94/123,876.45
6. Step 6: Final answer
   x = 112,596.74