Finding the Fourth Proportional to 12,711.72, 19,071.48 and 5,697.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,711.72 : 19,071.48 = 5,697.60 : x
2. Step 2: Convert to fraction form
   12,711.72/19,071.48 = 5,697.60/x
3. Step 3: Cross multiply
   12,711.72x = 19,071.48 × 5,697.60
4. Step 4: Simplify right side
   12,711.72x = 108,661,664.45
5. Step 5: Solve for x
   x = 108,661,664.45/12,711.72
6. Step 6: Final answer
   x = 8,548.15