Finding the Fourth Proportional to 31,388.49, 43,316.15 and 17,242.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,388.49 : 43,316.15 = 17,242.25 : x
2. Step 2: Convert to fraction form
   31,388.49/43,316.15 = 17,242.25/x
3. Step 3: Cross multiply
   31,388.49x = 43,316.15 × 17,242.25
4. Step 4: Simplify right side
   31,388.49x = 746,867,584.55
5. Step 5: Solve for x
   x = 746,867,584.55/31,388.49
6. Step 6: Final answer
   x = 23,794.31