Finding the Fourth Proportional to 9,966.06, 13,751.72 and 5,717.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.06 : 13,751.72 = 5,717.30 : x
2. Step 2: Convert to fraction form
   9,966.06/13,751.72 = 5,717.30/x
3. Step 3: Cross multiply
   9,966.06x = 13,751.72 × 5,717.30
4. Step 4: Simplify right side
   9,966.06x = 78,622,714.55
5. Step 5: Solve for x
   x = 78,622,714.55/9,966.06
6. Step 6: Final answer
   x = 7,889.05