Finding the Fourth Proportional to 12,874.50, 17,767.08 and 7,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,874.50 : 17,767.08 = 7,285.50 : x
2. Step 2: Convert to fraction form
   12,874.50/17,767.08 = 7,285.50/x
3. Step 3: Cross multiply
   12,874.50x = 17,767.08 × 7,285.50
4. Step 4: Simplify right side
   12,874.50x = 129,442,061.34
5. Step 5: Solve for x
   x = 129,442,061.34/12,874.50
6. Step 6: Final answer
   x = 10,054.14