Finding the Fourth Proportional to 1,425.25, 1,966.31 and 835.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.25 : 1,966.31 = 835.57 : x
2. Step 2: Convert to fraction form
   1,425.25/1,966.31 = 835.57/x
3. Step 3: Cross multiply
   1,425.25x = 1,966.31 × 835.57
4. Step 4: Simplify right side
   1,425.25x = 1,642,989.65
5. Step 5: Solve for x
   x = 1,642,989.65/1,425.25
6. Step 6: Final answer
   x = 1,152.77