Finding the Fourth Proportional to 6,128.48, 8,457.72 and 3,475.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.48 : 8,457.72 = 3,475.88 : x
2. Step 2: Convert to fraction form
   6,128.48/8,457.72 = 3,475.88/x
3. Step 3: Cross multiply
   6,128.48x = 8,457.72 × 3,475.88
4. Step 4: Simplify right side
   6,128.48x = 29,398,019.79
5. Step 5: Solve for x
   x = 29,398,019.79/6,128.48
6. Step 6: Final answer
   x = 4,796.95