Finding the Fourth Proportional to 1,245.43, 1,716.42 and 997.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.43 : 1,716.42 = 997.57 : x
2. Step 2: Convert to fraction form
   1,245.43/1,716.42 = 997.57/x
3. Step 3: Cross multiply
   1,245.43x = 1,716.42 × 997.57
4. Step 4: Simplify right side
   1,245.43x = 1,712,249.10
5. Step 5: Solve for x
   x = 1,712,249.10/1,245.43
6. Step 6: Final answer
   x = 1,374.83