Finding the Fourth Proportional to 21,477.25, 29,638.61 and 12,045.81

Step by Step Solution

1. Step 1: Write the proportion equation
   21,477.25 : 29,638.61 = 12,045.81 : x
2. Step 2: Convert to fraction form
   21,477.25/29,638.61 = 12,045.81/x
3. Step 3: Cross multiply
   21,477.25x = 29,638.61 × 12,045.81
4. Step 4: Simplify right side
   21,477.25x = 357,021,064.72
5. Step 5: Solve for x
   x = 357,021,064.72/21,477.25
6. Step 6: Final answer
   x = 16,623.22