Finding the Fourth Proportional to 2,289.97, 3,160.15 and 1,242.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.97 : 3,160.15 = 1,242.03 : x
2. Step 2: Convert to fraction form
   2,289.97/3,160.15 = 1,242.03/x
3. Step 3: Cross multiply
   2,289.97x = 3,160.15 × 1,242.03
4. Step 4: Simplify right side
   2,289.97x = 3,925,001.10
5. Step 5: Solve for x
   x = 3,925,001.10/2,289.97
6. Step 6: Final answer
   x = 1,714.00