Finding the Fourth Proportional to 21,475.83, 29,638.13 and 12,045

Step by Step Solution

1. Step 1: Write the proportion equation
   21,475.83 : 29,638.13 = 12,045 : x
2. Step 2: Convert to fraction form
   21,475.83/29,638.13 = 12,045/x
3. Step 3: Cross multiply
   21,475.83x = 29,638.13 × 12,045
4. Step 4: Simplify right side
   21,475.83x = 356,991,215.63
5. Step 5: Solve for x
   x = 356,991,215.63/21,475.83
6. Step 6: Final answer
   x = 16,622.93