Finding the Fourth Proportional to 21,320.69, 29,419.20 and 12,366.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,320.69 : 29,419.20 = 12,366.34 : x
2. Step 2: Convert to fraction form
   21,320.69/29,419.20 = 12,366.34/x
3. Step 3: Cross multiply
   21,320.69x = 29,419.20 × 12,366.34
4. Step 4: Simplify right side
   21,320.69x = 363,807,756.18
5. Step 5: Solve for x
   x = 363,807,756.18/21,320.69
6. Step 6: Final answer
   x = 17,063.61