Finding the Fourth Proportional to 2,645.50, 3,967.59 and 1,085.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.50 : 3,967.59 = 1,085.94 : x
2. Step 2: Convert to fraction form
   2,645.50/3,967.59 = 1,085.94/x
3. Step 3: Cross multiply
   2,645.50x = 3,967.59 × 1,085.94
4. Step 4: Simplify right side
   2,645.50x = 4,308,579.92
5. Step 5: Solve for x
   x = 4,308,579.92/2,645.50
6. Step 6: Final answer
   x = 1,628.65