Finding the Fourth Proportional to 16,620.32, 22,940.82 and 9,820.64

Step by Step Solution

1. Step 1: Write the proportion equation
   16,620.32 : 22,940.82 = 9,820.64 : x
2. Step 2: Convert to fraction form
   16,620.32/22,940.82 = 9,820.64/x
3. Step 3: Cross multiply
   16,620.32x = 22,940.82 × 9,820.64
4. Step 4: Simplify right side
   16,620.32x = 225,293,591.88
5. Step 5: Solve for x
   x = 225,293,591.88/16,620.32
6. Step 6: Final answer
   x = 13,555.31