Finding the Fourth Proportional to 2,086.41, 3,130.23 and 989.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.41 : 3,130.23 = 989.27 : x
2. Step 2: Convert to fraction form
   2,086.41/3,130.23 = 989.27/x
3. Step 3: Cross multiply
   2,086.41x = 3,130.23 × 989.27
4. Step 4: Simplify right side
   2,086.41x = 3,096,642.63
5. Step 5: Solve for x
   x = 3,096,642.63/2,086.41
6. Step 6: Final answer
   x = 1,484.20