Finding the Fourth Proportional to 1,915.76, 2,643.60 and 1,076.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.76 : 2,643.60 = 1,076.34 : x
2. Step 2: Convert to fraction form
   1,915.76/2,643.60 = 1,076.34/x
3. Step 3: Cross multiply
   1,915.76x = 2,643.60 × 1,076.34
4. Step 4: Simplify right side
   1,915.76x = 2,845,412.42
5. Step 5: Solve for x
   x = 2,845,412.42/1,915.76
6. Step 6: Final answer
   x = 1,485.27