Finding the Fourth Proportional to 2,290.05, 3,160.25 and 1,242.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.05 : 3,160.25 = 1,242.11 : x
2. Step 2: Convert to fraction form
   2,290.05/3,160.25 = 1,242.11/x
3. Step 3: Cross multiply
   2,290.05x = 3,160.25 × 1,242.11
4. Step 4: Simplify right side
   2,290.05x = 3,925,356.12
5. Step 5: Solve for x
   x = 3,925,356.12/2,290.05
6. Step 6: Final answer
   x = 1,714.09