Finding the Fourth Proportional to 1,867.63, 2,578.22 and 1,081.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.63 : 2,578.22 = 1,081.39 : x
2. Step 2: Convert to fraction form
   1,867.63/2,578.22 = 1,081.39/x
3. Step 3: Cross multiply
   1,867.63x = 2,578.22 × 1,081.39
4. Step 4: Simplify right side
   1,867.63x = 2,788,061.33
5. Step 5: Solve for x
   x = 2,788,061.33/1,867.63
6. Step 6: Final answer
   x = 1,492.83