Finding the Fourth Proportional to 21,436.45, 29,579.49 and 12,362.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,436.45 : 29,579.49 = 12,362.15 : x
2. Step 2: Convert to fraction form
   21,436.45/29,579.49 = 12,362.15/x
3. Step 3: Cross multiply
   21,436.45x = 29,579.49 × 12,362.15
4. Step 4: Simplify right side
   21,436.45x = 365,666,166.25
5. Step 5: Solve for x
   x = 365,666,166.25/21,436.45
6. Step 6: Final answer
   x = 17,058.15