Finding the Fourth Proportional to 100,112.88, 137,419.86 and 88,528.56

Step by Step Solution

1. Step 1: Write the proportion equation
   100,112.88 : 137,419.86 = 88,528.56 : x
2. Step 2: Convert to fraction form
   100,112.88/137,419.86 = 88,528.56/x
3. Step 3: Cross multiply
   100,112.88x = 137,419.86 × 88,528.56
4. Step 4: Simplify right side
   100,112.88x = 12,165,582,321.20
5. Step 5: Solve for x
   x = 12,165,582,321.20/100,112.88
6. Step 6: Final answer
   x = 121,518.65