Finding the Fourth Proportional to 1,086.99, 1,499.94 and 667.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.99 : 1,499.94 = 667.41 : x
2. Step 2: Convert to fraction form
   1,086.99/1,499.94 = 667.41/x
3. Step 3: Cross multiply
   1,086.99x = 1,499.94 × 667.41
4. Step 4: Simplify right side
   1,086.99x = 1,001,074.96
5. Step 5: Solve for x
   x = 1,001,074.96/1,086.99
6. Step 6: Final answer
   x = 920.96