Finding the Fourth Proportional to 1,915.34, 2,643.09 and 1,064.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.34 : 2,643.09 = 1,064.56 : x
2. Step 2: Convert to fraction form
   1,915.34/2,643.09 = 1,064.56/x
3. Step 3: Cross multiply
   1,915.34x = 2,643.09 × 1,064.56
4. Step 4: Simplify right side
   1,915.34x = 2,813,727.89
5. Step 5: Solve for x
   x = 2,813,727.89/1,915.34
6. Step 6: Final answer
   x = 1,469.05