Finding the Fourth Proportional to 21,013.31, 31,516.52 and 8,532.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,013.31 : 31,516.52 = 8,532.83 : x
2. Step 2: Convert to fraction form
   21,013.31/31,516.52 = 8,532.83/x
3. Step 3: Cross multiply
   21,013.31x = 31,516.52 × 8,532.83
4. Step 4: Simplify right side
   21,013.31x = 268,925,143.48
5. Step 5: Solve for x
   x = 268,925,143.48/21,013.31
6. Step 6: Final answer
   x = 12,797.85