Finding the Fourth Proportional to 1,356.88, 1,872.69 and 767.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.88 : 1,872.69 = 767.62 : x
2. Step 2: Convert to fraction form
   1,356.88/1,872.69 = 767.62/x
3. Step 3: Cross multiply
   1,356.88x = 1,872.69 × 767.62
4. Step 4: Simplify right side
   1,356.88x = 1,437,514.30
5. Step 5: Solve for x
   x = 1,437,514.30/1,356.88
6. Step 6: Final answer
   x = 1,059.43