Finding the Fourth Proportional to 5,128.03, 7,686.55 and 3,662.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128.03 : 7,686.55 = 3,662.74 : x
2. Step 2: Convert to fraction form
   5,128.03/7,686.55 = 3,662.74/x
3. Step 3: Cross multiply
   5,128.03x = 7,686.55 × 3,662.74
4. Step 4: Simplify right side
   5,128.03x = 28,153,805.77
5. Step 5: Solve for x
   x = 28,153,805.77/5,128.03
6. Step 6: Final answer
   x = 5,490.18