Finding the Fourth Proportional to 1,356.90, 1,872.38 and 767.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.90 : 1,872.38 = 767.52 : x
2. Step 2: Convert to fraction form
   1,356.90/1,872.38 = 767.52/x
3. Step 3: Cross multiply
   1,356.90x = 1,872.38 × 767.52
4. Step 4: Simplify right side
   1,356.90x = 1,437,089.10
5. Step 5: Solve for x
   x = 1,437,089.10/1,356.90
6. Step 6: Final answer
   x = 1,059.10