Finding the Fourth Proportional to 1,019.17, 1,532.17 and 815.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.17 : 1,532.17 = 815.96 : x
2. Step 2: Convert to fraction form
   1,019.17/1,532.17 = 815.96/x
3. Step 3: Cross multiply
   1,019.17x = 1,532.17 × 815.96
4. Step 4: Simplify right side
   1,019.17x = 1,250,189.43
5. Step 5: Solve for x
   x = 1,250,189.43/1,019.17
6. Step 6: Final answer
   x = 1,226.67