Finding the Fourth Proportional to 1,579.91, 2,179.32 and 1,019.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,579.91 : 2,179.32 = 1,019.48 : x
2. Step 2: Convert to fraction form
   1,579.91/2,179.32 = 1,019.48/x
3. Step 3: Cross multiply
   1,579.91x = 2,179.32 × 1,019.48
4. Step 4: Simplify right side
   1,579.91x = 2,221,773.15
5. Step 5: Solve for x
   x = 2,221,773.15/1,579.91
6. Step 6: Final answer
   x = 1,406.27