Finding the Fourth Proportional to 3,613.71, 5,411.67 and 2,985.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,613.71 : 5,411.67 = 2,985.16 : x
2. Step 2: Convert to fraction form
   3,613.71/5,411.67 = 2,985.16/x
3. Step 3: Cross multiply
   3,613.71x = 5,411.67 × 2,985.16
4. Step 4: Simplify right side
   3,613.71x = 16,154,699.89
5. Step 5: Solve for x
   x = 16,154,699.89/3,613.71
6. Step 6: Final answer
   x = 4,470.39