Finding the Fourth Proportional to 21,401.40, 32,105.18 and 6,611.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.40 : 32,105.18 = 6,611.61 : x
2. Step 2: Convert to fraction form
   21,401.40/32,105.18 = 6,611.61/x
3. Step 3: Cross multiply
   21,401.40x = 32,105.18 × 6,611.61
4. Step 4: Simplify right side
   21,401.40x = 212,266,929.14
5. Step 5: Solve for x
   x = 212,266,929.14/21,401.40
6. Step 6: Final answer
   x = 9,918.37