Finding the Fourth Proportional to 1,272.98, 1,756.71 and 775.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.98 : 1,756.71 = 775.52 : x
2. Step 2: Convert to fraction form
   1,272.98/1,756.71 = 775.52/x
3. Step 3: Cross multiply
   1,272.98x = 1,756.71 × 775.52
4. Step 4: Simplify right side
   1,272.98x = 1,362,354.96
5. Step 5: Solve for x
   x = 1,362,354.96/1,272.98
6. Step 6: Final answer
   x = 1,070.21