Finding the Fourth Proportional to 1,562.01, 2,155.61 and 863.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.01 : 2,155.61 = 863.39 : x
2. Step 2: Convert to fraction form
   1,562.01/2,155.61 = 863.39/x
3. Step 3: Cross multiply
   1,562.01x = 2,155.61 × 863.39
4. Step 4: Simplify right side
   1,562.01x = 1,861,117.02
5. Step 5: Solve for x
   x = 1,861,117.02/1,562.01
6. Step 6: Final answer
   x = 1,191.49