Finding the Fourth Proportional to 21,333.59, 29,440.50 and 12,386.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,333.59 : 29,440.50 = 12,386.42 : x
2. Step 2: Convert to fraction form
   21,333.59/29,440.50 = 12,386.42/x
3. Step 3: Cross multiply
   21,333.59x = 29,440.50 × 12,386.42
4. Step 4: Simplify right side
   21,333.59x = 364,662,398.01
5. Step 5: Solve for x
   x = 364,662,398.01/21,333.59
6. Step 6: Final answer
   x = 17,093.34