Finding the Fourth Proportional to 2,086.32, 3,125.88 and 990.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.32 : 3,125.88 = 990.24 : x
2. Step 2: Convert to fraction form
   2,086.32/3,125.88 = 990.24/x
3. Step 3: Cross multiply
   2,086.32x = 3,125.88 × 990.24
4. Step 4: Simplify right side
   2,086.32x = 3,095,371.41
5. Step 5: Solve for x
   x = 3,095,371.41/2,086.32
6. Step 6: Final answer
   x = 1,483.65