Finding the Fourth Proportional to 2,146.39, 3,218.27 and 913.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.39 : 3,218.27 = 913.10 : x
2. Step 2: Convert to fraction form
   2,146.39/3,218.27 = 913.10/x
3. Step 3: Cross multiply
   2,146.39x = 3,218.27 × 913.10
4. Step 4: Simplify right side
   2,146.39x = 2,938,581.68
5. Step 5: Solve for x
   x = 2,938,581.68/2,146.39
6. Step 6: Final answer
   x = 1,369.08