Finding the Fourth Proportional to 22,332.32, 30,821.34 and 12,900.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,332.32 : 30,821.34 = 12,900.88 : x
2. Step 2: Convert to fraction form
   22,332.32/30,821.34 = 12,900.88/x
3. Step 3: Cross multiply
   22,332.32x = 30,821.34 × 12,900.88
4. Step 4: Simplify right side
   22,332.32x = 397,622,408.78
5. Step 5: Solve for x
   x = 397,622,408.78/22,332.32
6. Step 6: Final answer
   x = 17,804.80