Finding the Fourth Proportional to 2,386.64, 3,293.81 and 1,338.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.64 : 3,293.81 = 1,338.71 : x
2. Step 2: Convert to fraction form
   2,386.64/3,293.81 = 1,338.71/x
3. Step 3: Cross multiply
   2,386.64x = 3,293.81 × 1,338.71
4. Step 4: Simplify right side
   2,386.64x = 4,409,433.22
5. Step 5: Solve for x
   x = 4,409,433.22/2,386.64
6. Step 6: Final answer
   x = 1,847.55