Finding the Fourth Proportional to 22,929.48, 31,644 and 12,861.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,929.48 : 31,644 = 12,861.15 : x
2. Step 2: Convert to fraction form
   22,929.48/31,644 = 12,861.15/x
3. Step 3: Cross multiply
   22,929.48x = 31,644 × 12,861.15
4. Step 4: Simplify right side
   22,929.48x = 406,978,230.60
5. Step 5: Solve for x
   x = 406,978,230.60/22,929.48
6. Step 6: Final answer
   x = 17,749.13