Finding the Fourth Proportional to 2,161.58, 3,240.86 and 1,065.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,161.58 : 3,240.86 = 1,065.69 : x
2. Step 2: Convert to fraction form
   2,161.58/3,240.86 = 1,065.69/x
3. Step 3: Cross multiply
   2,161.58x = 3,240.86 × 1,065.69
4. Step 4: Simplify right side
   2,161.58x = 3,453,746.76
5. Step 5: Solve for x
   x = 3,453,746.76/2,161.58
6. Step 6: Final answer
   x = 1,597.79