Finding the Fourth Proportional to 14,642.27, 21,921.33 and 8,620.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,642.27 : 21,921.33 = 8,620.12 : x
2. Step 2: Convert to fraction form
   14,642.27/21,921.33 = 8,620.12/x
3. Step 3: Cross multiply
   14,642.27x = 21,921.33 × 8,620.12
4. Step 4: Simplify right side
   14,642.27x = 188,964,554.89
5. Step 5: Solve for x
   x = 188,964,554.89/14,642.27
6. Step 6: Final answer
   x = 12,905.42