Finding the Fourth Proportional to 1,456.12, 2,179.86 and 877.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.12 : 2,179.86 = 877.24 : x
2. Step 2: Convert to fraction form
   1,456.12/2,179.86 = 877.24/x
3. Step 3: Cross multiply
   1,456.12x = 2,179.86 × 877.24
4. Step 4: Simplify right side
   1,456.12x = 1,912,260.39
5. Step 5: Solve for x
   x = 1,912,260.39/1,456.12
6. Step 6: Final answer
   x = 1,313.26