Finding the Fourth Proportional to 1,272.24, 1,755.27 and 774.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.24 : 1,755.27 = 774.72 : x
2. Step 2: Convert to fraction form
   1,272.24/1,755.27 = 774.72/x
3. Step 3: Cross multiply
   1,272.24x = 1,755.27 × 774.72
4. Step 4: Simplify right side
   1,272.24x = 1,359,842.77
5. Step 5: Solve for x
   x = 1,359,842.77/1,272.24
6. Step 6: Final answer
   x = 1,068.86