Finding the Fourth Proportional to 21,362.76, 29,480.82 and 12,406.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,362.76 : 29,480.82 = 12,406.98 : x
2. Step 2: Convert to fraction form
   21,362.76/29,480.82 = 12,406.98/x
3. Step 3: Cross multiply
   21,362.76x = 29,480.82 × 12,406.98
4. Step 4: Simplify right side
   21,362.76x = 365,767,944.12
5. Step 5: Solve for x
   x = 365,767,944.12/21,362.76
6. Step 6: Final answer
   x = 17,121.76