Finding the Fourth Proportional to 22,685.43, 31,303.76 and 21,013.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,685.43 : 31,303.76 = 21,013.59 : x
2. Step 2: Convert to fraction form
   22,685.43/31,303.76 = 21,013.59/x
3. Step 3: Cross multiply
   22,685.43x = 31,303.76 × 21,013.59
4. Step 4: Simplify right side
   22,685.43x = 657,804,273.03
5. Step 5: Solve for x
   x = 657,804,273.03/22,685.43
6. Step 6: Final answer
   x = 28,996.77