Finding the Fourth Proportional to 22,391.25, 30,900.66 and 12,320.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,391.25 : 30,900.66 = 12,320.81 : x
2. Step 2: Convert to fraction form
   22,391.25/30,900.66 = 12,320.81/x
3. Step 3: Cross multiply
   22,391.25x = 30,900.66 × 12,320.81
4. Step 4: Simplify right side
   22,391.25x = 380,721,075.91
5. Step 5: Solve for x
   x = 380,721,075.91/22,391.25
6. Step 6: Final answer
   x = 17,003.12