Finding the Fourth Proportional to 1,562.32, 2,156.10 and 863.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.32 : 2,156.10 = 863.72 : x
2. Step 2: Convert to fraction form
   1,562.32/2,156.10 = 863.72/x
3. Step 3: Cross multiply
   1,562.32x = 2,156.10 × 863.72
4. Step 4: Simplify right side
   1,562.32x = 1,862,266.69
5. Step 5: Solve for x
   x = 1,862,266.69/1,562.32
6. Step 6: Final answer
   x = 1,191.99