Finding the Fourth Proportional to 6,208.78, 8,565.28 and 3,689.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,208.78 : 8,565.28 = 3,689.48 : x
2. Step 2: Convert to fraction form
   6,208.78/8,565.28 = 3,689.48/x
3. Step 3: Cross multiply
   6,208.78x = 8,565.28 × 3,689.48
4. Step 4: Simplify right side
   6,208.78x = 31,601,429.25
5. Step 5: Solve for x
   x = 31,601,429.25/6,208.78
6. Step 6: Final answer
   x = 5,089.80