Finding the Fourth Proportional to 1,200.64, 1,656.96 and 676.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.64 : 1,656.96 = 676.48 : x
2. Step 2: Convert to fraction form
   1,200.64/1,656.96 = 676.48/x
3. Step 3: Cross multiply
   1,200.64x = 1,656.96 × 676.48
4. Step 4: Simplify right side
   1,200.64x = 1,120,900.30
5. Step 5: Solve for x
   x = 1,120,900.30/1,200.64
6. Step 6: Final answer
   x = 933.59