Finding the Fourth Proportional to 2,103.65, 3,155.47 and 787.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.65 : 3,155.47 = 787.35 : x
2. Step 2: Convert to fraction form
   2,103.65/3,155.47 = 787.35/x
3. Step 3: Cross multiply
   2,103.65x = 3,155.47 × 787.35
4. Step 4: Simplify right side
   2,103.65x = 2,484,459.30
5. Step 5: Solve for x
   x = 2,484,459.30/2,103.65
6. Step 6: Final answer
   x = 1,181.02