Finding the Fourth Proportional to 2,380.89, 3,571.97 and 993.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.89 : 3,571.97 = 993.77 : x
2. Step 2: Convert to fraction form
   2,380.89/3,571.97 = 993.77/x
3. Step 3: Cross multiply
   2,380.89x = 3,571.97 × 993.77
4. Step 4: Simplify right side
   2,380.89x = 3,549,693.80
5. Step 5: Solve for x
   x = 3,549,693.80/2,380.89
6. Step 6: Final answer
   x = 1,490.91