Finding the Fourth Proportional to 1,736.89, 2,396.80 and 990.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,736.89 : 2,396.80 = 990.83 : x
2. Step 2: Convert to fraction form
   1,736.89/2,396.80 = 990.83/x
3. Step 3: Cross multiply
   1,736.89x = 2,396.80 × 990.83
4. Step 4: Simplify right side
   1,736.89x = 2,374,821.34
5. Step 5: Solve for x
   x = 2,374,821.34/1,736.89
6. Step 6: Final answer
   x = 1,367.28