Finding the Fourth Proportional to 2,649.34, 3,973.08 and 774.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.34 : 3,973.08 = 774.72 : x
2. Step 2: Convert to fraction form
   2,649.34/3,973.08 = 774.72/x
3. Step 3: Cross multiply
   2,649.34x = 3,973.08 × 774.72
4. Step 4: Simplify right side
   2,649.34x = 3,078,034.47
5. Step 5: Solve for x
   x = 3,078,034.47/2,649.34
6. Step 6: Final answer
   x = 1,161.81