Finding the Fourth Proportional to 1,871.18, 2,579.47 and 1,198.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.18 : 2,579.47 = 1,198.91 : x
2. Step 2: Convert to fraction form
   1,871.18/2,579.47 = 1,198.91/x
3. Step 3: Cross multiply
   1,871.18x = 2,579.47 × 1,198.91
4. Step 4: Simplify right side
   1,871.18x = 3,092,544.69
5. Step 5: Solve for x
   x = 3,092,544.69/1,871.18
6. Step 6: Final answer
   x = 1,652.72