Finding the Fourth Proportional to 21,414.50, 29,570.25 and 13,470.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,414.50 : 29,570.25 = 13,470.02 : x
2. Step 2: Convert to fraction form
   21,414.50/29,570.25 = 13,470.02/x
3. Step 3: Cross multiply
   21,414.50x = 29,570.25 × 13,470.02
4. Step 4: Simplify right side
   21,414.50x = 398,311,858.91
5. Step 5: Solve for x
   x = 398,311,858.91/21,414.50
6. Step 6: Final answer
   x = 18,600.10