Finding the Fourth Proportional to 1,087.27, 1,500.05 and 667.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.27 : 1,500.05 = 667.31 : x
2. Step 2: Convert to fraction form
   1,087.27/1,500.05 = 667.31/x
3. Step 3: Cross multiply
   1,087.27x = 1,500.05 × 667.31
4. Step 4: Simplify right side
   1,087.27x = 1,000,992.53
5. Step 5: Solve for x
   x = 1,000,992.53/1,087.27
6. Step 6: Final answer
   x = 920.65