Finding the Fourth Proportional to 7,768.32, 10,647.98 and 7,658.96

Step by Step Solution

1. Step 1: Write the proportion equation
   7,768.32 : 10,647.98 = 7,658.96 : x
2. Step 2: Convert to fraction form
   7,768.32/10,647.98 = 7,658.96/x
3. Step 3: Cross multiply
   7,768.32x = 10,647.98 × 7,658.96
4. Step 4: Simplify right side
   7,768.32x = 81,552,452.90
5. Step 5: Solve for x
   x = 81,552,452.90/7,768.32
6. Step 6: Final answer
   x = 10,498.08