Finding the Fourth Proportional to 3,691.72, 5,531.34 and 2,908.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,691.72 : 5,531.34 = 2,908.60 : x
2. Step 2: Convert to fraction form
   3,691.72/5,531.34 = 2,908.60/x
3. Step 3: Cross multiply
   3,691.72x = 5,531.34 × 2,908.60
4. Step 4: Simplify right side
   3,691.72x = 16,088,455.52
5. Step 5: Solve for x
   x = 16,088,455.52/3,691.72
6. Step 6: Final answer
   x = 4,357.98