Finding the Fourth Proportional to 2,089.16, 3,131.04 and 993.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.16 : 3,131.04 = 993.86 : x
2. Step 2: Convert to fraction form
   2,089.16/3,131.04 = 993.86/x
3. Step 3: Cross multiply
   2,089.16x = 3,131.04 × 993.86
4. Step 4: Simplify right side
   2,089.16x = 3,111,815.41
5. Step 5: Solve for x
   x = 3,111,815.41/2,089.16
6. Step 6: Final answer
   x = 1,489.51