Finding the Fourth Proportional to 155,978.52, 215,250.36 and 84,358.55

Step by Step Solution

1. Step 1: Write the proportion equation
   155,978.52 : 215,250.36 = 84,358.55 : x
2. Step 2: Convert to fraction form
   155,978.52/215,250.36 = 84,358.55/x
3. Step 3: Cross multiply
   155,978.52x = 215,250.36 × 84,358.55
4. Step 4: Simplify right side
   155,978.52x = 18,158,207,180.33
5. Step 5: Solve for x
   x = 18,158,207,180.33/155,978.52
6. Step 6: Final answer
   x = 116,414.79