Finding the Fourth Proportional to 2,086.80, 3,127.82 and 989.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.80 : 3,127.82 = 989.61 : x
2. Step 2: Convert to fraction form
   2,086.80/3,127.82 = 989.61/x
3. Step 3: Cross multiply
   2,086.80x = 3,127.82 × 989.61
4. Step 4: Simplify right side
   2,086.80x = 3,095,317.00
5. Step 5: Solve for x
   x = 3,095,317.00/2,086.80
6. Step 6: Final answer
   x = 1,483.28