Finding the Fourth Proportional to 2,290.42, 3,160.76 and 1,242.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.42 : 3,160.76 = 1,242.48 : x
2. Step 2: Convert to fraction form
   2,290.42/3,160.76 = 1,242.48/x
3. Step 3: Cross multiply
   2,290.42x = 3,160.76 × 1,242.48
4. Step 4: Simplify right side
   2,290.42x = 3,927,184.19
5. Step 5: Solve for x
   x = 3,927,184.19/2,290.42
6. Step 6: Final answer
   x = 1,714.61