Finding the Fourth Proportional to 22,665, 31,279.62 and 12,730.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,665 : 31,279.62 = 12,730.92 : x
2. Step 2: Convert to fraction form
   22,665/31,279.62 = 12,730.92/x
3. Step 3: Cross multiply
   22,665x = 31,279.62 × 12,730.92
4. Step 4: Simplify right side
   22,665x = 398,218,339.85
5. Step 5: Solve for x
   x = 398,218,339.85/22,665
6. Step 6: Final answer
   x = 17,569.75