Finding the Fourth Proportional to 1,200.45, 1,656.61 and 676.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.45 : 1,656.61 = 676.47 : x
2. Step 2: Convert to fraction form
   1,200.45/1,656.61 = 676.47/x
3. Step 3: Cross multiply
   1,200.45x = 1,656.61 × 676.47
4. Step 4: Simplify right side
   1,200.45x = 1,120,645.28
5. Step 5: Solve for x
   x = 1,120,645.28/1,200.45
6. Step 6: Final answer
   x = 933.52