Finding the Fourth Proportional to 6,618.56, 9,132.86 and 3,928.82

Step by Step Solution

1. Step 1: Write the proportion equation
   6,618.56 : 9,132.86 = 3,928.82 : x
2. Step 2: Convert to fraction form
   6,618.56/9,132.86 = 3,928.82/x
3. Step 3: Cross multiply
   6,618.56x = 9,132.86 × 3,928.82
4. Step 4: Simplify right side
   6,618.56x = 35,881,343.38
5. Step 5: Solve for x
   x = 35,881,343.38/6,618.56
6. Step 6: Final answer
   x = 5,421.32