Finding the Fourth Proportional to 2,118.72, 3,160.07 and 2,081.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.72 : 3,160.07 = 2,081.82 : x
2. Step 2: Convert to fraction form
   2,118.72/3,160.07 = 2,081.82/x
3. Step 3: Cross multiply
   2,118.72x = 3,160.07 × 2,081.82
4. Step 4: Simplify right side
   2,118.72x = 6,578,702.13
5. Step 5: Solve for x
   x = 6,578,702.13/2,118.72
6. Step 6: Final answer
   x = 3,105.04