Finding the Fourth Proportional to 1,562.58, 2,156.31 and 863.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.58 : 2,156.31 = 863.94 : x
2. Step 2: Convert to fraction form
   1,562.58/2,156.31 = 863.94/x
3. Step 3: Cross multiply
   1,562.58x = 2,156.31 × 863.94
4. Step 4: Simplify right side
   1,562.58x = 1,862,922.46
5. Step 5: Solve for x
   x = 1,862,922.46/1,562.58
6. Step 6: Final answer
   x = 1,192.21