Finding the Fourth Proportional to 1,144.32, 1,579.17 and 620.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.32 : 1,579.17 = 620.37 : x
2. Step 2: Convert to fraction form
   1,144.32/1,579.17 = 620.37/x
3. Step 3: Cross multiply
   1,144.32x = 1,579.17 × 620.37
4. Step 4: Simplify right side
   1,144.32x = 979,669.69
5. Step 5: Solve for x
   x = 979,669.69/1,144.32
6. Step 6: Final answer
   x = 856.12