Finding the Fourth Proportional to 2,290.37, 3,160.67 and 1,242.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.37 : 3,160.67 = 1,242.45 : x
2. Step 2: Convert to fraction form
   2,290.37/3,160.67 = 1,242.45/x
3. Step 3: Cross multiply
   2,290.37x = 3,160.67 × 1,242.45
4. Step 4: Simplify right side
   2,290.37x = 3,926,968.23
5. Step 5: Solve for x
   x = 3,926,968.23/2,290.37
6. Step 6: Final answer
   x = 1,714.56