Finding the Fourth Proportional to 22,816.79, 31,488.04 and 13,256.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,816.79 : 31,488.04 = 13,256.56 : x
2. Step 2: Convert to fraction form
   22,816.79/31,488.04 = 13,256.56/x
3. Step 3: Cross multiply
   22,816.79x = 31,488.04 × 13,256.56
4. Step 4: Simplify right side
   22,816.79x = 417,423,147.47
5. Step 5: Solve for x
   x = 417,423,147.47/22,816.79
6. Step 6: Final answer
   x = 18,294.56