Finding the Fourth Proportional to 2,118.80, 3,160.18 and 1,791.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.80 : 3,160.18 = 1,791.80 : x
2. Step 2: Convert to fraction form
   2,118.80/3,160.18 = 1,791.80/x
3. Step 3: Cross multiply
   2,118.80x = 3,160.18 × 1,791.80
4. Step 4: Simplify right side
   2,118.80x = 5,662,410.52
5. Step 5: Solve for x
   x = 5,662,410.52/2,118.80
6. Step 6: Final answer
   x = 2,672.46