Finding the Fourth Proportional to 22,931.12, 31,646.64 and 12,859.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,931.12 : 31,646.64 = 12,859.52 : x
2. Step 2: Convert to fraction form
   22,931.12/31,646.64 = 12,859.52/x
3. Step 3: Cross multiply
   22,931.12x = 31,646.64 × 12,859.52
4. Step 4: Simplify right side
   22,931.12x = 406,960,600.01
5. Step 5: Solve for x
   x = 406,960,600.01/22,931.12
6. Step 6: Final answer
   x = 17,747.09