Finding the Fourth Proportional to 1,200.61, 1,656.86 and 676.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.61 : 1,656.86 = 676.63 : x
2. Step 2: Convert to fraction form
   1,200.61/1,656.86 = 676.63/x
3. Step 3: Cross multiply
   1,200.61x = 1,656.86 × 676.63
4. Step 4: Simplify right side
   1,200.61x = 1,121,077.80
5. Step 5: Solve for x
   x = 1,121,077.80/1,200.61
6. Step 6: Final answer
   x = 933.76