Finding the Fourth Proportional to 2,103.94, 3,155.46 and 787.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.94 : 3,155.46 = 787.64 : x
2. Step 2: Convert to fraction form
   2,103.94/3,155.46 = 787.64/x
3. Step 3: Cross multiply
   2,103.94x = 3,155.46 × 787.64
4. Step 4: Simplify right side
   2,103.94x = 2,485,365.53
5. Step 5: Solve for x
   x = 2,485,365.53/2,103.94
6. Step 6: Final answer
   x = 1,181.29