Finding the Fourth Proportional to 22,487.31, 31,032.28 and 12,415.53

Step by Step Solution

1. Step 1: Write the proportion equation
   22,487.31 : 31,032.28 = 12,415.53 : x
2. Step 2: Convert to fraction form
   22,487.31/31,032.28 = 12,415.53/x
3. Step 3: Cross multiply
   22,487.31x = 31,032.28 × 12,415.53
4. Step 4: Simplify right side
   22,487.31x = 385,282,335.20
5. Step 5: Solve for x
   x = 385,282,335.20/22,487.31
6. Step 6: Final answer
   x = 17,133.32