Finding the Fourth Proportional to 1,456.32, 2,010.23 and 858.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.32 : 2,010.23 = 858.80 : x
2. Step 2: Convert to fraction form
   1,456.32/2,010.23 = 858.80/x
3. Step 3: Cross multiply
   1,456.32x = 2,010.23 × 858.80
4. Step 4: Simplify right side
   1,456.32x = 1,726,371.18
5. Step 5: Solve for x
   x = 1,726,371.18/1,456.32
6. Step 6: Final answer
   x = 1,185.43