Finding the Fourth Proportional to 1,738.38, 2,398.90 and 1,242.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,738.38 : 2,398.90 = 1,242.22 : x
2. Step 2: Convert to fraction form
   1,738.38/2,398.90 = 1,242.22/x
3. Step 3: Cross multiply
   1,738.38x = 2,398.90 × 1,242.22
4. Step 4: Simplify right side
   1,738.38x = 2,979,961.56
5. Step 5: Solve for x
   x = 2,979,961.56/1,738.38
6. Step 6: Final answer
   x = 1,714.22