Finding the Fourth Proportional to 1,233.05, 1,850.58 and 648.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233.05 : 1,850.58 = 648.70 : x
2. Step 2: Convert to fraction form
   1,233.05/1,850.58 = 648.70/x
3. Step 3: Cross multiply
   1,233.05x = 1,850.58 × 648.70
4. Step 4: Simplify right side
   1,233.05x = 1,200,466.62
5. Step 5: Solve for x
   x = 1,200,466.62/1,233.05
6. Step 6: Final answer
   x = 973.58