Finding the Fourth Proportional to 22,390.48, 30,900.88 and 12,320.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,390.48 : 30,900.88 = 12,320.88 : x
2. Step 2: Convert to fraction form
   22,390.48/30,900.88 = 12,320.88/x
3. Step 3: Cross multiply
   22,390.48x = 30,900.88 × 12,320.88
4. Step 4: Simplify right side
   22,390.48x = 380,726,034.37
5. Step 5: Solve for x
   x = 380,726,034.37/22,390.48
6. Step 6: Final answer
   x = 17,003.92