Finding the Fourth Proportional to 2,031.17, 3,044.30 and 989.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.17 : 3,044.30 = 989.61 : x
2. Step 2: Convert to fraction form
   2,031.17/3,044.30 = 989.61/x
3. Step 3: Cross multiply
   2,031.17x = 3,044.30 × 989.61
4. Step 4: Simplify right side
   2,031.17x = 3,012,669.72
5. Step 5: Solve for x
   x = 3,012,669.72/2,031.17
6. Step 6: Final answer
   x = 1,483.22