Finding the Fourth Proportional to 88,671.20, 132,836.16 and 55,404.32

Step by Step Solution

1. Step 1: Write the proportion equation
   88,671.20 : 132,836.16 = 55,404.32 : x
2. Step 2: Convert to fraction form
   88,671.20/132,836.16 = 55,404.32/x
3. Step 3: Cross multiply
   88,671.20x = 132,836.16 × 55,404.32
4. Step 4: Simplify right side
   88,671.20x = 7,359,697,116.21
5. Step 5: Solve for x
   x = 7,359,697,116.21/88,671.20
6. Step 6: Final answer
   x = 82,999.86