Finding the Fourth Proportional to 22,666, 31,279.10 and 12,730

Step by Step Solution

1. Step 1: Write the proportion equation
   22,666 : 31,279.10 = 12,730 : x
2. Step 2: Convert to fraction form
   22,666/31,279.10 = 12,730/x
3. Step 3: Cross multiply
   22,666x = 31,279.10 × 12,730
4. Step 4: Simplify right side
   22,666x = 398,182,943
5. Step 5: Solve for x
   x = 398,182,943/22,666
6. Step 6: Final answer
   x = 17,567.41