Finding the Fourth Proportional to 3,530.16, 4,860.50 and 2,688.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,530.16 : 4,860.50 = 2,688.17 : x
2. Step 2: Convert to fraction form
   3,530.16/4,860.50 = 2,688.17/x
3. Step 3: Cross multiply
   3,530.16x = 4,860.50 × 2,688.17
4. Step 4: Simplify right side
   3,530.16x = 13,065,812.54
5. Step 5: Solve for x
   x = 13,065,812.54/3,530.16
6. Step 6: Final answer
   x = 3,701.20