Finding the Fourth Proportional to 1,356.83, 1,872.45 and 767.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.83 : 1,872.45 = 767.39 : x
2. Step 2: Convert to fraction form
   1,356.83/1,872.45 = 767.39/x
3. Step 3: Cross multiply
   1,356.83x = 1,872.45 × 767.39
4. Step 4: Simplify right side
   1,356.83x = 1,436,899.41
5. Step 5: Solve for x
   x = 1,436,899.41/1,356.83
6. Step 6: Final answer
   x = 1,059.01