Finding the Fourth Proportional to 22,426.88, 30,949.09 and 13,000.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,426.88 : 30,949.09 = 13,000.91 : x
2. Step 2: Convert to fraction form
   22,426.88/30,949.09 = 13,000.91/x
3. Step 3: Cross multiply
   22,426.88x = 30,949.09 × 13,000.91
4. Step 4: Simplify right side
   22,426.88x = 402,366,146.42
5. Step 5: Solve for x
   x = 402,366,146.42/22,426.88
6. Step 6: Final answer
   x = 17,941.25