Finding the Fourth Proportional to 1,096.76, 1,643.24 and 787.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.76 : 1,643.24 = 787.10 : x
2. Step 2: Convert to fraction form
   1,096.76/1,643.24 = 787.10/x
3. Step 3: Cross multiply
   1,096.76x = 1,643.24 × 787.10
4. Step 4: Simplify right side
   1,096.76x = 1,293,387.96
5. Step 5: Solve for x
   x = 1,293,387.96/1,096.76
6. Step 6: Final answer
   x = 1,179.28