Finding the Fourth Proportional to 1,200.59, 1,656.81 and 676.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.59 : 1,656.81 = 676.65 : x
2. Step 2: Convert to fraction form
   1,200.59/1,656.81 = 676.65/x
3. Step 3: Cross multiply
   1,200.59x = 1,656.81 × 676.65
4. Step 4: Simplify right side
   1,200.59x = 1,121,080.49
5. Step 5: Solve for x
   x = 1,121,080.49/1,200.59
6. Step 6: Final answer
   x = 933.78