Finding the Fourth Proportional to 1,867.89, 2,577.40 and 1,081.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.89 : 2,577.40 = 1,081.78 : x
2. Step 2: Convert to fraction form
   1,867.89/2,577.40 = 1,081.78/x
3. Step 3: Cross multiply
   1,867.89x = 2,577.40 × 1,081.78
4. Step 4: Simplify right side
   1,867.89x = 2,788,174.36
5. Step 5: Solve for x
   x = 2,788,174.36/1,867.89
6. Step 6: Final answer
   x = 1,492.69