Finding the Fourth Proportional to 20,931.47, 31,401.15 and 13,483.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,931.47 : 31,401.15 = 13,483.52 : x
2. Step 2: Convert to fraction form
   20,931.47/31,401.15 = 13,483.52/x
3. Step 3: Cross multiply
   20,931.47x = 31,401.15 × 13,483.52
4. Step 4: Simplify right side
   20,931.47x = 423,398,034.05
5. Step 5: Solve for x
   x = 423,398,034.05/20,931.47
6. Step 6: Final answer
   x = 20,227.82