Finding the Fourth Proportional to 2,054.39, 3,081.53 and 667.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.39 : 3,081.53 = 667.68 : x
2. Step 2: Convert to fraction form
   2,054.39/3,081.53 = 667.68/x
3. Step 3: Cross multiply
   2,054.39x = 3,081.53 × 667.68
4. Step 4: Simplify right side
   2,054.39x = 2,057,472.61
5. Step 5: Solve for x
   x = 2,057,472.61/2,054.39
6. Step 6: Final answer
   x = 1,001.50