Finding the Fourth Proportional to 1,008.36, 1,392.33 and 787.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.36 : 1,392.33 = 787.95 : x
2. Step 2: Convert to fraction form
   1,008.36/1,392.33 = 787.95/x
3. Step 3: Cross multiply
   1,008.36x = 1,392.33 × 787.95
4. Step 4: Simplify right side
   1,008.36x = 1,097,086.42
5. Step 5: Solve for x
   x = 1,097,086.42/1,008.36
6. Step 6: Final answer
   x = 1,087.99