Finding the Fourth Proportional to 1,362.02, 1,879.57 and 772.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.02 : 1,879.57 = 772.55 : x
2. Step 2: Convert to fraction form
   1,362.02/1,879.57 = 772.55/x
3. Step 3: Cross multiply
   1,362.02x = 1,879.57 × 772.55
4. Step 4: Simplify right side
   1,362.02x = 1,452,050.47
5. Step 5: Solve for x
   x = 1,452,050.47/1,362.02
6. Step 6: Final answer
   x = 1,066.10