Finding the Fourth Proportional to 1,562.71, 2,156.52 and 864.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.71 : 2,156.52 = 864.10 : x
2. Step 2: Convert to fraction form
   1,562.71/2,156.52 = 864.10/x
3. Step 3: Cross multiply
   1,562.71x = 2,156.52 × 864.10
4. Step 4: Simplify right side
   1,562.71x = 1,863,448.93
5. Step 5: Solve for x
   x = 1,863,448.93/1,562.71
6. Step 6: Final answer
   x = 1,192.45