Finding the Fourth Proportional to 1,200.53, 1,656.63 and 676.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.53 : 1,656.63 = 676.65 : x
2. Step 2: Convert to fraction form
   1,200.53/1,656.63 = 676.65/x
3. Step 3: Cross multiply
   1,200.53x = 1,656.63 × 676.65
4. Step 4: Simplify right side
   1,200.53x = 1,120,958.69
5. Step 5: Solve for x
   x = 1,120,958.69/1,200.53
6. Step 6: Final answer
   x = 933.72