Finding the Fourth Proportional to 1,200.41, 1,656.56 and 648.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.41 : 1,656.56 = 648.41 : x
2. Step 2: Convert to fraction form
   1,200.41/1,656.56 = 648.41/x
3. Step 3: Cross multiply
   1,200.41x = 1,656.56 × 648.41
4. Step 4: Simplify right side
   1,200.41x = 1,074,125.93
5. Step 5: Solve for x
   x = 1,074,125.93/1,200.41
6. Step 6: Final answer
   x = 894.80