Finding the Fourth Proportional to 9,945.76, 13,719.42 and 5,964.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.76 : 13,719.42 = 5,964.55 : x
2. Step 2: Convert to fraction form
   9,945.76/13,719.42 = 5,964.55/x
3. Step 3: Cross multiply
   9,945.76x = 13,719.42 × 5,964.55
4. Step 4: Simplify right side
   9,945.76x = 81,830,166.56
5. Step 5: Solve for x
   x = 81,830,166.56/9,945.76
6. Step 6: Final answer
   x = 8,227.64