Finding the Fourth Proportional to 22,708.29, 31,357.35 and 21,964.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,708.29 : 31,357.35 = 21,964.71 : x
2. Step 2: Convert to fraction form
   22,708.29/31,357.35 = 21,964.71/x
3. Step 3: Cross multiply
   22,708.29x = 31,357.35 × 21,964.71
4. Step 4: Simplify right side
   22,708.29x = 688,755,099.12
5. Step 5: Solve for x
   x = 688,755,099.12/22,708.29
6. Step 6: Final answer
   x = 30,330.56