Finding the Fourth Proportional to 846.78, 1,168.61 and 788.46

Step by Step Solution

1. Step 1: Write the proportion equation
   846.78 : 1,168.61 = 788.46 : x
2. Step 2: Convert to fraction form
   846.78/1,168.61 = 788.46/x
3. Step 3: Cross multiply
   846.78x = 1,168.61 × 788.46
4. Step 4: Simplify right side
   846.78x = 921,398.30
5. Step 5: Solve for x
   x = 921,398.30/846.78
6. Step 6: Final answer
   x = 1,088.12