Finding the Fourth Proportional to 2,065.79, 3,081.72 and 2,009.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.79 : 3,081.72 = 2,009.31 : x
2. Step 2: Convert to fraction form
   2,065.79/3,081.72 = 2,009.31/x
3. Step 3: Cross multiply
   2,065.79x = 3,081.72 × 2,009.31
4. Step 4: Simplify right side
   2,065.79x = 6,192,130.81
5. Step 5: Solve for x
   x = 6,192,130.81/2,065.79
6. Step 6: Final answer
   x = 2,997.47