Finding the Fourth Proportional to 21,300.69, 29,397.14 and 12,805.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.69 : 29,397.14 = 12,805.58 : x
2. Step 2: Convert to fraction form
   21,300.69/29,397.14 = 12,805.58/x
3. Step 3: Cross multiply
   21,300.69x = 29,397.14 × 12,805.58
4. Step 4: Simplify right side
   21,300.69x = 376,447,557.56
5. Step 5: Solve for x
   x = 376,447,557.56/21,300.69
6. Step 6: Final answer
   x = 17,673.02