Finding the Fourth Proportional to 1,357.82, 1,874.58 and 860.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.82 : 1,874.58 = 860.88 : x
2. Step 2: Convert to fraction form
   1,357.82/1,874.58 = 860.88/x
3. Step 3: Cross multiply
   1,357.82x = 1,874.58 × 860.88
4. Step 4: Simplify right side
   1,357.82x = 1,613,788.43
5. Step 5: Solve for x
   x = 1,613,788.43/1,357.82
6. Step 6: Final answer
   x = 1,188.52