Finding the Fourth Proportional to 2,847.72, 4,271.28 and 767.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,847.72 : 4,271.28 = 767.59 : x
2. Step 2: Convert to fraction form
   2,847.72/4,271.28 = 767.59/x
3. Step 3: Cross multiply
   2,847.72x = 4,271.28 × 767.59
4. Step 4: Simplify right side
   2,847.72x = 3,278,602.55
5. Step 5: Solve for x
   x = 3,278,602.55/2,847.72
6. Step 6: Final answer
   x = 1,151.31