Finding the Fourth Proportional to 1,867.80, 2,577.60 and 1,081.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.80 : 2,577.60 = 1,081.88 : x
2. Step 2: Convert to fraction form
   1,867.80/2,577.60 = 1,081.88/x
3. Step 3: Cross multiply
   1,867.80x = 2,577.60 × 1,081.88
4. Step 4: Simplify right side
   1,867.80x = 2,788,653.89
5. Step 5: Solve for x
   x = 2,788,653.89/1,867.80
6. Step 6: Final answer
   x = 1,493.02