Finding the Fourth Proportional to 1,562.76, 2,156.61 and 864.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.76 : 2,156.61 = 864.13 : x
2. Step 2: Convert to fraction form
   1,562.76/2,156.61 = 864.13/x
3. Step 3: Cross multiply
   1,562.76x = 2,156.61 × 864.13
4. Step 4: Simplify right side
   1,562.76x = 1,863,591.40
5. Step 5: Solve for x
   x = 1,863,591.40/1,562.76
6. Step 6: Final answer
   x = 1,192.50