Finding the Fourth Proportional to 21,308.81, 29,396.71 and 14,933.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,308.81 : 29,396.71 = 14,933.07 : x
2. Step 2: Convert to fraction form
   21,308.81/29,396.71 = 14,933.07/x
3. Step 3: Cross multiply
   21,308.81x = 29,396.71 × 14,933.07
4. Step 4: Simplify right side
   21,308.81x = 438,983,128.20
5. Step 5: Solve for x
   x = 438,983,128.20/21,308.81
6. Step 6: Final answer
   x = 20,601.02