Finding the Fourth Proportional to 11,907.72, 17,859.15 and 4,509.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,907.72 : 17,859.15 = 4,509.63 : x
2. Step 2: Convert to fraction form
   11,907.72/17,859.15 = 4,509.63/x
3. Step 3: Cross multiply
   11,907.72x = 17,859.15 × 4,509.63
4. Step 4: Simplify right side
   11,907.72x = 80,538,158.61
5. Step 5: Solve for x
   x = 80,538,158.61/11,907.72
6. Step 6: Final answer
   x = 6,763.52