Finding the Fourth Proportional to 8,597.83, 12,882.16 and 7,781.35

Step by Step Solution

1. Step 1: Write the proportion equation
   8,597.83 : 12,882.16 = 7,781.35 : x
2. Step 2: Convert to fraction form
   8,597.83/12,882.16 = 7,781.35/x
3. Step 3: Cross multiply
   8,597.83x = 12,882.16 × 7,781.35
4. Step 4: Simplify right side
   8,597.83x = 100,240,595.72
5. Step 5: Solve for x
   x = 100,240,595.72/8,597.83
6. Step 6: Final answer
   x = 11,658.83