Finding the Fourth Proportional to 155,978.15, 215,276.32 and 88,014.39

Step by Step Solution

1. Step 1: Write the proportion equation
   155,978.15 : 215,276.32 = 88,014.39 : x
2. Step 2: Convert to fraction form
   155,978.15/215,276.32 = 88,014.39/x
3. Step 3: Cross multiply
   155,978.15x = 215,276.32 × 88,014.39
4. Step 4: Simplify right side
   155,978.15x = 18,947,413,546.17
5. Step 5: Solve for x
   x = 18,947,413,546.17/155,978.15
6. Step 6: Final answer
   x = 121,474.79