Finding the Fourth Proportional to 1,744.50, 2,407.42 and 998.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,744.50 : 2,407.42 = 998.61 : x
2. Step 2: Convert to fraction form
   1,744.50/2,407.42 = 998.61/x
3. Step 3: Cross multiply
   1,744.50x = 2,407.42 × 998.61
4. Step 4: Simplify right side
   1,744.50x = 2,404,073.69
5. Step 5: Solve for x
   x = 2,404,073.69/1,744.50
6. Step 6: Final answer
   x = 1,378.09