Finding the Fourth Proportional to 1,016.34, 1,521.81 and 809.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.34 : 1,521.81 = 809.52 : x
2. Step 2: Convert to fraction form
   1,016.34/1,521.81 = 809.52/x
3. Step 3: Cross multiply
   1,016.34x = 1,521.81 × 809.52
4. Step 4: Simplify right side
   1,016.34x = 1,231,935.63
5. Step 5: Solve for x
   x = 1,231,935.63/1,016.34
6. Step 6: Final answer
   x = 1,212.13