Finding the Fourth Proportional to 1,047.30, 1,569.15 and 863.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.30 : 1,569.15 = 863.70 : x
2. Step 2: Convert to fraction form
   1,047.30/1,569.15 = 863.70/x
3. Step 3: Cross multiply
   1,047.30x = 1,569.15 × 863.70
4. Step 4: Simplify right side
   1,047.30x = 1,355,274.86
5. Step 5: Solve for x
   x = 1,355,274.86/1,047.30
6. Step 6: Final answer
   x = 1,294.07