Finding the Fourth Proportional to 1,579.98, 2,180.47 and 871.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,579.98 : 2,180.47 = 871.82 : x
2. Step 2: Convert to fraction form
   1,579.98/2,180.47 = 871.82/x
3. Step 3: Cross multiply
   1,579.98x = 2,180.47 × 871.82
4. Step 4: Simplify right side
   1,579.98x = 1,900,977.36
5. Step 5: Solve for x
   x = 1,900,977.36/1,579.98
6. Step 6: Final answer
   x = 1,203.17