Finding the Fourth Proportional to 1,689.89, 2,530.04 and 1,228.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.89 : 2,530.04 = 1,228.46 : x
2. Step 2: Convert to fraction form
   1,689.89/2,530.04 = 1,228.46/x
3. Step 3: Cross multiply
   1,689.89x = 2,530.04 × 1,228.46
4. Step 4: Simplify right side
   1,689.89x = 3,108,034.15
5. Step 5: Solve for x
   x = 3,108,034.15/1,689.89
6. Step 6: Final answer
   x = 1,839.20