Finding the Fourth Proportional to 88,951.28, 133,579.60 and 78,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   88,951.28 : 133,579.60 = 78,978.56 : x
2. Step 2: Convert to fraction form
   88,951.28/133,579.60 = 78,978.56/x
3. Step 3: Cross multiply
   88,951.28x = 133,579.60 × 78,978.56
4. Step 4: Simplify right side
   88,951.28x = 10,549,924,453.38
5. Step 5: Solve for x
   x = 10,549,924,453.38/88,951.28
6. Step 6: Final answer
   x = 118,603.40