Finding the Fourth Proportional to 22,401.80, 33,610.25 and 9,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,401.80 : 33,610.25 = 9,920.10 : x
2. Step 2: Convert to fraction form
   22,401.80/33,610.25 = 9,920.10/x
3. Step 3: Cross multiply
   22,401.80x = 33,610.25 × 9,920.10
4. Step 4: Simplify right side
   22,401.80x = 333,417,065.83
5. Step 5: Solve for x
   x = 333,417,065.83/22,401.80
6. Step 6: Final answer
   x = 14,883.50