Finding the Fourth Proportional to 1,948.69, 2,689.22 and 1,064.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.69 : 2,689.22 = 1,064.57 : x
2. Step 2: Convert to fraction form
   1,948.69/2,689.22 = 1,064.57/x
3. Step 3: Cross multiply
   1,948.69x = 2,689.22 × 1,064.57
4. Step 4: Simplify right side
   1,948.69x = 2,862,857.61
5. Step 5: Solve for x
   x = 2,862,857.61/1,948.69
6. Step 6: Final answer
   x = 1,469.12