Finding the Fourth Proportional to 1,915.84, 2,643.78 and 1,065.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.84 : 2,643.78 = 1,065.06 : x
2. Step 2: Convert to fraction form
   1,915.84/2,643.78 = 1,065.06/x
3. Step 3: Cross multiply
   1,915.84x = 2,643.78 × 1,065.06
4. Step 4: Simplify right side
   1,915.84x = 2,815,784.33
5. Step 5: Solve for x
   x = 2,815,784.33/1,915.84
6. Step 6: Final answer
   x = 1,469.74