Finding the Fourth Proportional to 1,562.27, 2,155.90 and 863.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.27 : 2,155.90 = 863.63 : x
2. Step 2: Convert to fraction form
   1,562.27/2,155.90 = 863.63/x
3. Step 3: Cross multiply
   1,562.27x = 2,155.90 × 863.63
4. Step 4: Simplify right side
   1,562.27x = 1,861,886.98
5. Step 5: Solve for x
   x = 1,861,886.98/1,562.27
6. Step 6: Final answer
   x = 1,191.79