Finding the Fourth Proportional to 22,685.12, 31,300.89 and 13,251.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,685.12 : 31,300.89 = 13,251.86 : x
2. Step 2: Convert to fraction form
   22,685.12/31,300.89 = 13,251.86/x
3. Step 3: Cross multiply
   22,685.12x = 31,300.89 × 13,251.86
4. Step 4: Simplify right side
   22,685.12x = 414,795,012.16
5. Step 5: Solve for x
   x = 414,795,012.16/22,685.12
6. Step 6: Final answer
   x = 18,284.89