Finding the Fourth Proportional to 21,124.78, 29,159.54 and 13,064.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,124.78 : 29,159.54 = 13,064.61 : x
2. Step 2: Convert to fraction form
   21,124.78/29,159.54 = 13,064.61/x
3. Step 3: Cross multiply
   21,124.78x = 29,159.54 × 13,064.61
4. Step 4: Simplify right side
   21,124.78x = 380,957,946.87
5. Step 5: Solve for x
   x = 380,957,946.87/21,124.78
6. Step 6: Final answer
   x = 18,033.70