Finding the Fourth Proportional to 2,547.09, 3,819.96 and 1,085.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.09 : 3,819.96 = 1,085.31 : x
2. Step 2: Convert to fraction form
   2,547.09/3,819.96 = 1,085.31/x
3. Step 3: Cross multiply
   2,547.09x = 3,819.96 × 1,085.31
4. Step 4: Simplify right side
   2,547.09x = 4,145,840.79
5. Step 5: Solve for x
   x = 4,145,840.79/2,547.09
6. Step 6: Final answer
   x = 1,627.68