Finding the Fourth Proportional to 1,915.50, 2,643.34 and 1,064.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.50 : 2,643.34 = 1,064.69 : x
2. Step 2: Convert to fraction form
   1,915.50/2,643.34 = 1,064.69/x
3. Step 3: Cross multiply
   1,915.50x = 2,643.34 × 1,064.69
4. Step 4: Simplify right side
   1,915.50x = 2,814,344.27
5. Step 5: Solve for x
   x = 2,814,344.27/1,915.50
6. Step 6: Final answer
   x = 1,469.25