Finding the Fourth Proportional to 1,046.45, 1,569.69 and 814.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.45 : 1,569.69 = 814.79 : x
2. Step 2: Convert to fraction form
   1,046.45/1,569.69 = 814.79/x
3. Step 3: Cross multiply
   1,046.45x = 1,569.69 × 814.79
4. Step 4: Simplify right side
   1,046.45x = 1,278,967.72
5. Step 5: Solve for x
   x = 1,278,967.72/1,046.45
6. Step 6: Final answer
   x = 1,222.20