Finding the Fourth Proportional to 1,424.80, 1,966.24 and 835.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.80 : 1,966.24 = 835.34 : x
2. Step 2: Convert to fraction form
   1,424.80/1,966.24 = 835.34/x
3. Step 3: Cross multiply
   1,424.80x = 1,966.24 × 835.34
4. Step 4: Simplify right side
   1,424.80x = 1,642,484.88
5. Step 5: Solve for x
   x = 1,642,484.88/1,424.80
6. Step 6: Final answer
   x = 1,152.78