Finding the Fourth Proportional to 2,270.80, 3,133.69 and 1,386.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,270.80 : 3,133.69 = 1,386.43 : x
2. Step 2: Convert to fraction form
   2,270.80/3,133.69 = 1,386.43/x
3. Step 3: Cross multiply
   2,270.80x = 3,133.69 × 1,386.43
4. Step 4: Simplify right side
   2,270.80x = 4,344,641.83
5. Step 5: Solve for x
   x = 4,344,641.83/2,270.80
6. Step 6: Final answer
   x = 1,913.26