Finding the Fourth Proportional to 21,401.12, 32,096.64 and 12,045.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.12 : 32,096.64 = 12,045.12 : x
2. Step 2: Convert to fraction form
   21,401.12/32,096.64 = 12,045.12/x
3. Step 3: Cross multiply
   21,401.12x = 32,096.64 × 12,045.12
4. Step 4: Simplify right side
   21,401.12x = 386,607,880.40
5. Step 5: Solve for x
   x = 386,607,880.40/21,401.12
6. Step 6: Final answer
   x = 18,064.84