Finding the Fourth Proportional to 21,317.29, 29,417.37 and 12,365.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,317.29 : 29,417.37 = 12,365.62 : x
2. Step 2: Convert to fraction form
   21,317.29/29,417.37 = 12,365.62/x
3. Step 3: Cross multiply
   21,317.29x = 29,417.37 × 12,365.62
4. Step 4: Simplify right side
   21,317.29x = 363,764,018.82
5. Step 5: Solve for x
   x = 363,764,018.82/21,317.29
6. Step 6: Final answer
   x = 17,064.27