Finding the Fourth Proportional to 3,690.56, 5,531.16 and 3,651.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.56 : 5,531.16 = 3,651.50 : x
2. Step 2: Convert to fraction form
   3,690.56/5,531.16 = 3,651.50/x
3. Step 3: Cross multiply
   3,690.56x = 5,531.16 × 3,651.50
4. Step 4: Simplify right side
   3,690.56x = 20,197,030.74
5. Step 5: Solve for x
   x = 20,197,030.74/3,690.56
6. Step 6: Final answer
   x = 5,472.62