Finding the Fourth Proportional to 1,356.52, 1,871.89 and 767.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.52 : 1,871.89 = 767.11 : x
2. Step 2: Convert to fraction form
   1,356.52/1,871.89 = 767.11/x
3. Step 3: Cross multiply
   1,356.52x = 1,871.89 × 767.11
4. Step 4: Simplify right side
   1,356.52x = 1,435,945.54
5. Step 5: Solve for x
   x = 1,435,945.54/1,356.52
6. Step 6: Final answer
   x = 1,058.55