Finding the Fourth Proportional to 2,290.39, 3,160.71 and 1,242.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.39 : 3,160.71 = 1,242.43 : x
2. Step 2: Convert to fraction form
   2,290.39/3,160.71 = 1,242.43/x
3. Step 3: Cross multiply
   2,290.39x = 3,160.71 × 1,242.43
4. Step 4: Simplify right side
   2,290.39x = 3,926,960.93
5. Step 5: Solve for x
   x = 3,926,960.93/2,290.39
6. Step 6: Final answer
   x = 1,714.54