Finding the Fourth Proportional to 39,717.82, 54,811.50 and 21,814

Step by Step Solution

1. Step 1: Write the proportion equation
   39,717.82 : 54,811.50 = 21,814 : x
2. Step 2: Convert to fraction form
   39,717.82/54,811.50 = 21,814/x
3. Step 3: Cross multiply
   39,717.82x = 54,811.50 × 21,814
4. Step 4: Simplify right side
   39,717.82x = 1,195,658,061
5. Step 5: Solve for x
   x = 1,195,658,061/39,717.82
6. Step 6: Final answer
   x = 30,103.82