Finding the Fourth Proportional to 30,517.47, 42,109.20 and 17,089.29

Step by Step Solution

1. Step 1: Write the proportion equation
   30,517.47 : 42,109.20 = 17,089.29 : x
2. Step 2: Convert to fraction form
   30,517.47/42,109.20 = 17,089.29/x
3. Step 3: Cross multiply
   30,517.47x = 42,109.20 × 17,089.29
4. Step 4: Simplify right side
   30,517.47x = 719,616,330.47
5. Step 5: Solve for x
   x = 719,616,330.47/30,517.47
6. Step 6: Final answer
   x = 23,580.47