Finding the Fourth Proportional to 788.52, 1,087.37 and 648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   788.52 : 1,087.37 = 648.50 : x
2. Step 2: Convert to fraction form
   788.52/1,087.37 = 648.50/x
3. Step 3: Cross multiply
   788.52x = 1,087.37 × 648.50
4. Step 4: Simplify right side
   788.52x = 705,150.77
5. Step 5: Solve for x
   x = 705,150.77/788.52
6. Step 6: Final answer
   x = 894.27