Finding the Fourth Proportional to 9,319.56, 12,860.88 and 5,127.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,319.56 : 12,860.88 = 5,127.72 : x
2. Step 2: Convert to fraction form
   9,319.56/12,860.88 = 5,127.72/x
3. Step 3: Cross multiply
   9,319.56x = 12,860.88 × 5,127.72
4. Step 4: Simplify right side
   9,319.56x = 65,946,991.59
5. Step 5: Solve for x
   x = 65,946,991.59/9,319.56
6. Step 6: Final answer
   x = 7,076.19