Finding the Fourth Proportional to 9,071.76, 12,519.42 and 5,713.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,071.76 : 12,519.42 = 5,713.30 : x
2. Step 2: Convert to fraction form
   9,071.76/12,519.42 = 5,713.30/x
3. Step 3: Cross multiply
   9,071.76x = 12,519.42 × 5,713.30
4. Step 4: Simplify right side
   9,071.76x = 71,527,202.29
5. Step 5: Solve for x
   x = 71,527,202.29/9,071.76
6. Step 6: Final answer
   x = 7,884.60