Finding the Fourth Proportional to 6,128.30, 8,458.26 and 3,892.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.30 : 8,458.26 = 3,892.79 : x
2. Step 2: Convert to fraction form
   6,128.30/8,458.26 = 3,892.79/x
3. Step 3: Cross multiply
   6,128.30x = 8,458.26 × 3,892.79
4. Step 4: Simplify right side
   6,128.30x = 32,926,229.95
5. Step 5: Solve for x
   x = 32,926,229.95/6,128.30
6. Step 6: Final answer
   x = 5,372.82