Finding the Fourth Proportional to 1,472.17, 2,031.37 and 809.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,472.17 : 2,031.37 = 809.05 : x
2. Step 2: Convert to fraction form
   1,472.17/2,031.37 = 809.05/x
3. Step 3: Cross multiply
   1,472.17x = 2,031.37 × 809.05
4. Step 4: Simplify right side
   1,472.17x = 1,643,479.90
5. Step 5: Solve for x
   x = 1,643,479.90/1,472.17
6. Step 6: Final answer
   x = 1,116.37