Finding the Fourth Proportional to 2,659.73, 3,989.42 and 993.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.73 : 3,989.42 = 993.53 : x
2. Step 2: Convert to fraction form
   2,659.73/3,989.42 = 993.53/x
3. Step 3: Cross multiply
   2,659.73x = 3,989.42 × 993.53
4. Step 4: Simplify right side
   2,659.73x = 3,963,608.45
5. Step 5: Solve for x
   x = 3,963,608.45/2,659.73
6. Step 6: Final answer
   x = 1,490.23