Finding the Fourth Proportional to 22,428.81, 30,951.81 and 12,869.04

Step by Step Solution

1. Step 1: Write the proportion equation
   22,428.81 : 30,951.81 = 12,869.04 : x
2. Step 2: Convert to fraction form
   22,428.81/30,951.81 = 12,869.04/x
3. Step 3: Cross multiply
   22,428.81x = 30,951.81 × 12,869.04
4. Step 4: Simplify right side
   22,428.81x = 398,320,080.96
5. Step 5: Solve for x
   x = 398,320,080.96/22,428.81
6. Step 6: Final answer
   x = 17,759.31