Finding the Fourth Proportional to 2,290.46, 3,160.82 and 1,242.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.46 : 3,160.82 = 1,242.50 : x
2. Step 2: Convert to fraction form
   2,290.46/3,160.82 = 1,242.50/x
3. Step 3: Cross multiply
   2,290.46x = 3,160.82 × 1,242.50
4. Step 4: Simplify right side
   2,290.46x = 3,927,318.85
5. Step 5: Solve for x
   x = 3,927,318.85/2,290.46
6. Step 6: Final answer
   x = 1,714.64