Finding the Fourth Proportional to 2,089.02, 3,131.37 and 992.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.02 : 3,131.37 = 992.55 : x
2. Step 2: Convert to fraction form
   2,089.02/3,131.37 = 992.55/x
3. Step 3: Cross multiply
   2,089.02x = 3,131.37 × 992.55
4. Step 4: Simplify right side
   2,089.02x = 3,108,036.33
5. Step 5: Solve for x
   x = 3,108,036.33/2,089.02
6. Step 6: Final answer
   x = 1,487.80