Finding the Fourth Proportional to 22,528.50, 31,087.99 and 12,456.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,528.50 : 31,087.99 = 12,456.15 : x
2. Step 2: Convert to fraction form
   22,528.50/31,087.99 = 12,456.15/x
3. Step 3: Cross multiply
   22,528.50x = 31,087.99 × 12,456.15
4. Step 4: Simplify right side
   22,528.50x = 387,236,666.64
5. Step 5: Solve for x
   x = 387,236,666.64/22,528.50
6. Step 6: Final answer
   x = 17,188.75