Finding the Fourth Proportional to 1,241.32, 1,860.42 and 1,086.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,241.32 : 1,860.42 = 1,086.88 : x
2. Step 2: Convert to fraction form
   1,241.32/1,860.42 = 1,086.88/x
3. Step 3: Cross multiply
   1,241.32x = 1,860.42 × 1,086.88
4. Step 4: Simplify right side
   1,241.32x = 2,022,053.29
5. Step 5: Solve for x
   x = 2,022,053.29/1,241.32
6. Step 6: Final answer
   x = 1,628.95