Finding the Fourth Proportional to 1,579.59, 2,179.76 and 880.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,579.59 : 2,179.76 = 880.83 : x
2. Step 2: Convert to fraction form
   1,579.59/2,179.76 = 880.83/x
3. Step 3: Cross multiply
   1,579.59x = 2,179.76 × 880.83
4. Step 4: Simplify right side
   1,579.59x = 1,919,993.60
5. Step 5: Solve for x
   x = 1,919,993.60/1,579.59
6. Step 6: Final answer
   x = 1,215.50