Finding the Fourth Proportional to 895.50, 1,340.37 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   895.50 : 1,340.37 = 648.72 : x
2. Step 2: Convert to fraction form
   895.50/1,340.37 = 648.72/x
3. Step 3: Cross multiply
   895.50x = 1,340.37 × 648.72
4. Step 4: Simplify right side
   895.50x = 869,524.83
5. Step 5: Solve for x
   x = 869,524.83/895.50
6. Step 6: Final answer
   x = 970.99