Finding the Fourth Proportional to 2,103.91, 3,155.85 and 787.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.91 : 3,155.85 = 787.59 : x
2. Step 2: Convert to fraction form
   2,103.91/3,155.85 = 787.59/x
3. Step 3: Cross multiply
   2,103.91x = 3,155.85 × 787.59
4. Step 4: Simplify right side
   2,103.91x = 2,485,515.90
5. Step 5: Solve for x
   x = 2,485,515.90/2,103.91
6. Step 6: Final answer
   x = 1,181.38