Finding the Fourth Proportional to 11,820.72, 17,734.14 and 4,425.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.72 : 17,734.14 = 4,425.76 : x
2. Step 2: Convert to fraction form
   11,820.72/17,734.14 = 4,425.76/x
3. Step 3: Cross multiply
   11,820.72x = 17,734.14 × 4,425.76
4. Step 4: Simplify right side
   11,820.72x = 78,487,047.45
5. Step 5: Solve for x
   x = 78,487,047.45/11,820.72
6. Step 6: Final answer
   x = 6,639.79