Finding the Fourth Proportional to 21,603.72, 29,817 and 12,650.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,603.72 : 29,817 = 12,650.70 : x
2. Step 2: Convert to fraction form
   21,603.72/29,817 = 12,650.70/x
3. Step 3: Cross multiply
   21,603.72x = 29,817 × 12,650.70
4. Step 4: Simplify right side
   21,603.72x = 377,205,921.90
5. Step 5: Solve for x
   x = 377,205,921.90/21,603.72
6. Step 6: Final answer
   x = 17,460.23