Finding the Fourth Proportional to 6,611.31, 9,110.42 and 4,717.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,611.31 : 9,110.42 = 4,717.55 : x
2. Step 2: Convert to fraction form
   6,611.31/9,110.42 = 4,717.55/x
3. Step 3: Cross multiply
   6,611.31x = 9,110.42 × 4,717.55
4. Step 4: Simplify right side
   6,611.31x = 42,978,792.73
5. Step 5: Solve for x
   x = 42,978,792.73/6,611.31
6. Step 6: Final answer
   x = 6,500.80