Finding the Fourth Proportional to 1,736.72, 2,396.78 and 990.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,736.72 : 2,396.78 = 990.92 : x
2. Step 2: Convert to fraction form
   1,736.72/2,396.78 = 990.92/x
3. Step 3: Cross multiply
   1,736.72x = 2,396.78 × 990.92
4. Step 4: Simplify right side
   1,736.72x = 2,375,017.24
5. Step 5: Solve for x
   x = 2,375,017.24/1,736.72
6. Step 6: Final answer
   x = 1,367.53