Finding the Fourth Proportional to 8,633.67, 12,886.43 and 7,442.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,633.67 : 12,886.43 = 7,442.61 : x
2. Step 2: Convert to fraction form
   8,633.67/12,886.43 = 7,442.61/x
3. Step 3: Cross multiply
   8,633.67x = 12,886.43 × 7,442.61
4. Step 4: Simplify right side
   8,633.67x = 95,908,672.78
5. Step 5: Solve for x
   x = 95,908,672.78/8,633.67
6. Step 6: Final answer
   x = 11,108.68