Finding the Fourth Proportional to 8,686.33, 11,980.78 and 7,493.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,686.33 : 11,980.78 = 7,493.61 : x
2. Step 2: Convert to fraction form
   8,686.33/11,980.78 = 7,493.61/x
3. Step 3: Cross multiply
   8,686.33x = 11,980.78 × 7,493.61
4. Step 4: Simplify right side
   8,686.33x = 89,779,292.82
5. Step 5: Solve for x
   x = 89,779,292.82/8,686.33
6. Step 6: Final answer
   x = 10,335.70