Finding the Fourth Proportional to 1,479.34, 2,218.35 and 863.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.34 : 2,218.35 = 863.47 : x
2. Step 2: Convert to fraction form
   1,479.34/2,218.35 = 863.47/x
3. Step 3: Cross multiply
   1,479.34x = 2,218.35 × 863.47
4. Step 4: Simplify right side
   1,479.34x = 1,915,478.67
5. Step 5: Solve for x
   x = 1,915,478.67/1,479.34
6. Step 6: Final answer
   x = 1,294.82