Finding the Fourth Proportional to 22,981.13, 31,716.69 and 12,909.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,981.13 : 31,716.69 = 12,909.59 : x
2. Step 2: Convert to fraction form
   22,981.13/31,716.69 = 12,909.59/x
3. Step 3: Cross multiply
   22,981.13x = 31,716.69 × 12,909.59
4. Step 4: Simplify right side
   22,981.13x = 409,449,464.06
5. Step 5: Solve for x
   x = 409,449,464.06/22,981.13
6. Step 6: Final answer
   x = 17,816.77