Finding the Fourth Proportional to 1,736.24, 2,395.98 and 990.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,736.24 : 2,395.98 = 990.43 : x
2. Step 2: Convert to fraction form
   1,736.24/2,395.98 = 990.43/x
3. Step 3: Cross multiply
   1,736.24x = 2,395.98 × 990.43
4. Step 4: Simplify right side
   1,736.24x = 2,373,044.48
5. Step 5: Solve for x
   x = 2,373,044.48/1,736.24
6. Step 6: Final answer
   x = 1,366.78