Finding the Fourth Proportional to 21,498.92, 29,669.36 and 12,423.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.92 : 29,669.36 = 12,423.98 : x
2. Step 2: Convert to fraction form
   21,498.92/29,669.36 = 12,423.98/x
3. Step 3: Cross multiply
   21,498.92x = 29,669.36 × 12,423.98
4. Step 4: Simplify right side
   21,498.92x = 368,611,640.49
5. Step 5: Solve for x
   x = 368,611,640.49/21,498.92
6. Step 6: Final answer
   x = 17,145.59