Finding the Fourth Proportional to 2,613.16, 3,921.86 and 1,381.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.16 : 3,921.86 = 1,381.33 : x
2. Step 2: Convert to fraction form
   2,613.16/3,921.86 = 1,381.33/x
3. Step 3: Cross multiply
   2,613.16x = 3,921.86 × 1,381.33
4. Step 4: Simplify right side
   2,613.16x = 5,417,382.87
5. Step 5: Solve for x
   x = 5,417,382.87/2,613.16
6. Step 6: Final answer
   x = 2,073.12