Finding the Fourth Proportional to 1,200.34, 1,656.48 and 648.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.34 : 1,656.48 = 648.34 : x
2. Step 2: Convert to fraction form
   1,200.34/1,656.48 = 648.34/x
3. Step 3: Cross multiply
   1,200.34x = 1,656.48 × 648.34
4. Step 4: Simplify right side
   1,200.34x = 1,073,965.21
5. Step 5: Solve for x
   x = 1,073,965.21/1,200.34
6. Step 6: Final answer
   x = 894.71