Finding the Fourth Proportional to 2,085.24, 3,130.06 and 990.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.24 : 3,130.06 = 990.52 : x
2. Step 2: Convert to fraction form
   2,085.24/3,130.06 = 990.52/x
3. Step 3: Cross multiply
   2,085.24x = 3,130.06 × 990.52
4. Step 4: Simplify right side
   2,085.24x = 3,100,387.03
5. Step 5: Solve for x
   x = 3,100,387.03/2,085.24
6. Step 6: Final answer
   x = 1,486.83