Finding the Fourth Proportional to 1,689.61, 2,326.28 and 1,490.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.61 : 2,326.28 = 1,490.27 : x
2. Step 2: Convert to fraction form
   1,689.61/2,326.28 = 1,490.27/x
3. Step 3: Cross multiply
   1,689.61x = 2,326.28 × 1,490.27
4. Step 4: Simplify right side
   1,689.61x = 3,466,766.21
5. Step 5: Solve for x
   x = 3,466,766.21/1,689.61
6. Step 6: Final answer
   x = 2,051.82