Finding the Fourth Proportional to 21,150.69, 29,174.71 and 13,606.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.69 : 29,174.71 = 13,606.84 : x
2. Step 2: Convert to fraction form
   21,150.69/29,174.71 = 13,606.84/x
3. Step 3: Cross multiply
   21,150.69x = 29,174.71 × 13,606.84
4. Step 4: Simplify right side
   21,150.69x = 396,975,611.02
5. Step 5: Solve for x
   x = 396,975,611.02/21,150.69
6. Step 6: Final answer
   x = 18,768.92