Finding the Fourth Proportional to 21,034.35, 31,354.90 and 20,713.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,034.35 : 31,354.90 = 20,713.59 : x
2. Step 2: Convert to fraction form
   21,034.35/31,354.90 = 20,713.59/x
3. Step 3: Cross multiply
   21,034.35x = 31,354.90 × 20,713.59
4. Step 4: Simplify right side
   21,034.35x = 649,472,491.31
5. Step 5: Solve for x
   x = 649,472,491.31/21,034.35
6. Step 6: Final answer
   x = 30,876.76