Finding the Fourth Proportional to 2,472.09, 3,709.39 and 1,085.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,472.09 : 3,709.39 = 1,085.07 : x
2. Step 2: Convert to fraction form
   2,472.09/3,709.39 = 1,085.07/x
3. Step 3: Cross multiply
   2,472.09x = 3,709.39 × 1,085.07
4. Step 4: Simplify right side
   2,472.09x = 4,024,947.81
5. Step 5: Solve for x
   x = 4,024,947.81/2,472.09
6. Step 6: Final answer
   x = 1,628.16