Finding the Fourth Proportional to 1,356.93, 1,872.67 and 767.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.93 : 1,872.67 = 767.57 : x
2. Step 2: Convert to fraction form
   1,356.93/1,872.67 = 767.57/x
3. Step 3: Cross multiply
   1,356.93x = 1,872.67 × 767.57
4. Step 4: Simplify right side
   1,356.93x = 1,437,405.31
5. Step 5: Solve for x
   x = 1,437,405.31/1,356.93
6. Step 6: Final answer
   x = 1,059.31