Finding the Fourth Proportional to 21,310.82, 29,409 and 12,363.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,310.82 : 29,409 = 12,363.62 : x
2. Step 2: Convert to fraction form
   21,310.82/29,409 = 12,363.62/x
3. Step 3: Cross multiply
   21,310.82x = 29,409 × 12,363.62
4. Step 4: Simplify right side
   21,310.82x = 363,601,700.58
5. Step 5: Solve for x
   x = 363,601,700.58/21,310.82
6. Step 6: Final answer
   x = 17,061.84