Finding the Fourth Proportional to 1,384.75, 1,910.88 and 787.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.75 : 1,910.88 = 787.16 : x
2. Step 2: Convert to fraction form
   1,384.75/1,910.88 = 787.16/x
3. Step 3: Cross multiply
   1,384.75x = 1,910.88 × 787.16
4. Step 4: Simplify right side
   1,384.75x = 1,504,178.42
5. Step 5: Solve for x
   x = 1,504,178.42/1,384.75
6. Step 6: Final answer
   x = 1,086.24