Finding the Fourth Proportional to 22,929.86, 31,644 and 12,858.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,929.86 : 31,644 = 12,858.42 : x
2. Step 2: Convert to fraction form
   22,929.86/31,644 = 12,858.42/x
3. Step 3: Cross multiply
   22,929.86x = 31,644 × 12,858.42
4. Step 4: Simplify right side
   22,929.86x = 406,891,842.48
5. Step 5: Solve for x
   x = 406,891,842.48/22,929.86
6. Step 6: Final answer
   x = 17,745.06