Finding the Fourth Proportional to 88,172.64, 132,120.72 and 74,970.72

Step by Step Solution

1. Step 1: Write the proportion equation
   88,172.64 : 132,120.72 = 74,970.72 : x
2. Step 2: Convert to fraction form
   88,172.64/132,120.72 = 74,970.72/x
3. Step 3: Cross multiply
   88,172.64x = 132,120.72 × 74,970.72
4. Step 4: Simplify right side
   88,172.64x = 9,905,185,505.32
5. Step 5: Solve for x
   x = 9,905,185,505.32/88,172.64
6. Step 6: Final answer
   x = 112,338.54