Finding the Fourth Proportional to 2,099.98, 3,150.78 and 783.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.98 : 3,150.78 = 783.73 : x
2. Step 2: Convert to fraction form
   2,099.98/3,150.78 = 783.73/x
3. Step 3: Cross multiply
   2,099.98x = 3,150.78 × 783.73
4. Step 4: Simplify right side
   2,099.98x = 2,469,360.81
5. Step 5: Solve for x
   x = 2,469,360.81/2,099.98
6. Step 6: Final answer
   x = 1,175.90