Finding the Fourth Proportional to 30,517.20, 42,114.72 and 17,088.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,517.20 : 42,114.72 = 17,088.96 : x
2. Step 2: Convert to fraction form
   30,517.20/42,114.72 = 17,088.96/x
3. Step 3: Cross multiply
   30,517.20x = 42,114.72 × 17,088.96
4. Step 4: Simplify right side
   30,517.20x = 719,696,765.49
5. Step 5: Solve for x
   x = 719,696,765.49/30,517.20
6. Step 6: Final answer
   x = 23,583.32