Finding the Fourth Proportional to 11,603.72, 17,404.76 and 4,206.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,603.72 : 17,404.76 = 4,206.80 : x
2. Step 2: Convert to fraction form
   11,603.72/17,404.76 = 4,206.80/x
3. Step 3: Cross multiply
   11,603.72x = 17,404.76 × 4,206.80
4. Step 4: Simplify right side
   11,603.72x = 73,218,344.37
5. Step 5: Solve for x
   x = 73,218,344.37/11,603.72
6. Step 6: Final answer
   x = 6,309.90