Finding the Fourth Proportional to 21,946.72, 32,910 and 12,082.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,946.72 : 32,910 = 12,082.72 : x
2. Step 2: Convert to fraction form
   21,946.72/32,910 = 12,082.72/x
3. Step 3: Cross multiply
   21,946.72x = 32,910 × 12,082.72
4. Step 4: Simplify right side
   21,946.72x = 397,642,315.20
5. Step 5: Solve for x
   x = 397,642,315.20/21,946.72
6. Step 6: Final answer
   x = 18,118.53