Finding the Fourth Proportional to 9,969.60, 13,757.48 and 5,719.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969.60 : 13,757.48 = 5,719.76 : x
2. Step 2: Convert to fraction form
   9,969.60/13,757.48 = 5,719.76/x
3. Step 3: Cross multiply
   9,969.60x = 13,757.48 × 5,719.76
4. Step 4: Simplify right side
   9,969.60x = 78,689,483.80
5. Step 5: Solve for x
   x = 78,689,483.80/9,969.60
6. Step 6: Final answer
   x = 7,892.94