Finding the Fourth Proportional to 1,738.59, 2,399.31 and 992.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,738.59 : 2,399.31 = 992.55 : x
2. Step 2: Convert to fraction form
   1,738.59/2,399.31 = 992.55/x
3. Step 3: Cross multiply
   1,738.59x = 2,399.31 × 992.55
4. Step 4: Simplify right side
   1,738.59x = 2,381,435.14
5. Step 5: Solve for x
   x = 2,381,435.14/1,738.59
6. Step 6: Final answer
   x = 1,369.75