Finding the Fourth Proportional to 2,086.02, 3,124.85 and 991.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.02 : 3,124.85 = 991.44 : x
2. Step 2: Convert to fraction form
   2,086.02/3,124.85 = 991.44/x
3. Step 3: Cross multiply
   2,086.02x = 3,124.85 × 991.44
4. Step 4: Simplify right side
   2,086.02x = 3,098,096.33
5. Step 5: Solve for x
   x = 3,098,096.33/2,086.02
6. Step 6: Final answer
   x = 1,485.17