Finding the Fourth Proportional to 21,424.18, 29,564.71 and 12,349.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,424.18 : 29,564.71 = 12,349.57 : x
2. Step 2: Convert to fraction form
   21,424.18/29,564.71 = 12,349.57/x
3. Step 3: Cross multiply
   21,424.18x = 29,564.71 × 12,349.57
4. Step 4: Simplify right side
   21,424.18x = 365,111,455.67
5. Step 5: Solve for x
   x = 365,111,455.67/21,424.18
6. Step 6: Final answer
   x = 17,042.03