Finding the Fourth Proportional to 2,290.50, 3,160.89 and 1,242.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.50 : 3,160.89 = 1,242.57 : x
2. Step 2: Convert to fraction form
   2,290.50/3,160.89 = 1,242.57/x
3. Step 3: Cross multiply
   2,290.50x = 3,160.89 × 1,242.57
4. Step 4: Simplify right side
   2,290.50x = 3,927,627.09
5. Step 5: Solve for x
   x = 3,927,627.09/2,290.50
6. Step 6: Final answer
   x = 1,714.75