Finding the Fourth Proportional to 12,697.59, 17,523.29 and 7,661.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,697.59 : 17,523.29 = 7,661.72 : x
2. Step 2: Convert to fraction form
   12,697.59/17,523.29 = 7,661.72/x
3. Step 3: Cross multiply
   12,697.59x = 17,523.29 × 7,661.72
4. Step 4: Simplify right side
   12,697.59x = 134,258,557.24
5. Step 5: Solve for x
   x = 134,258,557.24/12,697.59
6. Step 6: Final answer
   x = 10,573.55