Finding the Fourth Proportional to 1,915.35, 2,643.12 and 1,076.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.35 : 2,643.12 = 1,076.15 : x
2. Step 2: Convert to fraction form
   1,915.35/2,643.12 = 1,076.15/x
3. Step 3: Cross multiply
   1,915.35x = 2,643.12 × 1,076.15
4. Step 4: Simplify right side
   1,915.35x = 2,844,380.37
5. Step 5: Solve for x
   x = 2,844,380.37/1,915.35
6. Step 6: Final answer
   x = 1,485.04