Finding the Fourth Proportional to 1,200.38, 1,656.52 and 648.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.38 : 1,656.52 = 648.38 : x
2. Step 2: Convert to fraction form
   1,200.38/1,656.52 = 648.38/x
3. Step 3: Cross multiply
   1,200.38x = 1,656.52 × 648.38
4. Step 4: Simplify right side
   1,200.38x = 1,074,044.53
5. Step 5: Solve for x
   x = 1,074,044.53/1,200.38
6. Step 6: Final answer
   x = 894.76