Finding the Fourth Proportional to 6,128.32, 8,454.28 and 3,769.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.32 : 8,454.28 = 3,769.60 : x
2. Step 2: Convert to fraction form
   6,128.32/8,454.28 = 3,769.60/x
3. Step 3: Cross multiply
   6,128.32x = 8,454.28 × 3,769.60
4. Step 4: Simplify right side
   6,128.32x = 31,869,253.89
5. Step 5: Solve for x
   x = 31,869,253.89/6,128.32
6. Step 6: Final answer
   x = 5,200.32