Finding the Fourth Proportional to 8,013.31, 12,020.00 and 5,257.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,013.31 : 12,020.00 = 5,257.42 : x
2. Step 2: Convert to fraction form
   8,013.31/12,020.00 = 5,257.42/x
3. Step 3: Cross multiply
   8,013.31x = 12,020.00 × 5,257.42
4. Step 4: Simplify right side
   8,013.31x = 63,194,132.06
5. Step 5: Solve for x
   x = 63,194,132.06/8,013.31
6. Step 6: Final answer
   x = 7,886.15