Finding the Fourth Proportional to 21,730.30, 32,432.54 and 20,311.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,730.30 : 32,432.54 = 20,311.52 : x
2. Step 2: Convert to fraction form
   21,730.30/32,432.54 = 20,311.52/x
3. Step 3: Cross multiply
   21,730.30x = 32,432.54 × 20,311.52
4. Step 4: Simplify right side
   21,730.30x = 658,754,164.38
5. Step 5: Solve for x
   x = 658,754,164.38/21,730.30
6. Step 6: Final answer
   x = 30,315.01