Finding the Fourth Proportional to 21,312.82, 29,411.76 and 12,365.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,312.82 : 29,411.76 = 12,365.62 : x
2. Step 2: Convert to fraction form
   21,312.82/29,411.76 = 12,365.62/x
3. Step 3: Cross multiply
   21,312.82x = 29,411.76 × 12,365.62
4. Step 4: Simplify right side
   21,312.82x = 363,694,647.69
5. Step 5: Solve for x
   x = 363,694,647.69/21,312.82
6. Step 6: Final answer
   x = 17,064.60