Finding the Fourth Proportional to 1,200.47, 1,656.75 and 676.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.47 : 1,656.75 = 676.61 : x
2. Step 2: Convert to fraction form
   1,200.47/1,656.75 = 676.61/x
3. Step 3: Cross multiply
   1,200.47x = 1,656.75 × 676.61
4. Step 4: Simplify right side
   1,200.47x = 1,120,965.33
5. Step 5: Solve for x
   x = 1,120,965.33/1,200.47
6. Step 6: Final answer
   x = 933.78