Finding the Fourth Proportional to 1,356.74, 1,872.06 and 767.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.74 : 1,872.06 = 767.10 : x
2. Step 2: Convert to fraction form
   1,356.74/1,872.06 = 767.10/x
3. Step 3: Cross multiply
   1,356.74x = 1,872.06 × 767.10
4. Step 4: Simplify right side
   1,356.74x = 1,436,057.23
5. Step 5: Solve for x
   x = 1,436,057.23/1,356.74
6. Step 6: Final answer
   x = 1,058.47