Finding the Fourth Proportional to 2,613.77, 3,938.73 and 2,488.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.77 : 3,938.73 = 2,488.62 : x
2. Step 2: Convert to fraction form
   2,613.77/3,938.73 = 2,488.62/x
3. Step 3: Cross multiply
   2,613.77x = 3,938.73 × 2,488.62
4. Step 4: Simplify right side
   2,613.77x = 9,802,007.69
5. Step 5: Solve for x
   x = 9,802,007.69/2,613.77
6. Step 6: Final answer
   x = 3,750.14