Finding the Fourth Proportional to 88,275.31, 121,820.72 and 47,989.15

Step by Step Solution

1. Step 1: Write the proportion equation
   88,275.31 : 121,820.72 = 47,989.15 : x
2. Step 2: Convert to fraction form
   88,275.31/121,820.72 = 47,989.15/x
3. Step 3: Cross multiply
   88,275.31x = 121,820.72 × 47,989.15
4. Step 4: Simplify right side
   88,275.31x = 5,846,072,260.69
5. Step 5: Solve for x
   x = 5,846,072,260.69/88,275.31
6. Step 6: Final answer
   x = 66,225.45