Finding the Fourth Proportional to 6,660.56, 9,961.38 and 5,925.35

Step by Step Solution

1. Step 1: Write the proportion equation
   6,660.56 : 9,961.38 = 5,925.35 : x
2. Step 2: Convert to fraction form
   6,660.56/9,961.38 = 5,925.35/x
3. Step 3: Cross multiply
   6,660.56x = 9,961.38 × 5,925.35
4. Step 4: Simplify right side
   6,660.56x = 59,024,687.89
5. Step 5: Solve for x
   x = 59,024,687.89/6,660.56
6. Step 6: Final answer
   x = 8,861.82