Finding the Fourth Proportional to 1,356.89, 1,872.45 and 767.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.89 : 1,872.45 = 767.41 : x
2. Step 2: Convert to fraction form
   1,356.89/1,872.45 = 767.41/x
3. Step 3: Cross multiply
   1,356.89x = 1,872.45 × 767.41
4. Step 4: Simplify right side
   1,356.89x = 1,436,923.66
5. Step 5: Solve for x
   x = 1,436,923.66/1,356.89
6. Step 6: Final answer
   x = 1,058.99