Finding the Fourth Proportional to 1,562.13, 2,155.73 and 863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.13 : 2,155.73 = 863.50 : x
2. Step 2: Convert to fraction form
   1,562.13/2,155.73 = 863.50/x
3. Step 3: Cross multiply
   1,562.13x = 2,155.73 × 863.50
4. Step 4: Simplify right side
   1,562.13x = 1,861,472.86
5. Step 5: Solve for x
   x = 1,861,472.86/1,562.13
6. Step 6: Final answer
   x = 1,191.62