Finding the Fourth Proportional to 22,487.31, 31,031.19 and 12,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,487.31 : 31,031.19 = 12,415.50 : x
2. Step 2: Convert to fraction form
   22,487.31/31,031.19 = 12,415.50/x
3. Step 3: Cross multiply
   22,487.31x = 31,031.19 × 12,415.50
4. Step 4: Simplify right side
   22,487.31x = 385,267,739.45
5. Step 5: Solve for x
   x = 385,267,739.45/22,487.31
6. Step 6: Final answer
   x = 17,132.67