Finding the Fourth Proportional to 7,145.76, 9,839.72 and 5,964.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,145.76 : 9,839.72 = 5,964.80 : x
2. Step 2: Convert to fraction form
   7,145.76/9,839.72 = 5,964.80/x
3. Step 3: Cross multiply
   7,145.76x = 9,839.72 × 5,964.80
4. Step 4: Simplify right side
   7,145.76x = 58,691,961.86
5. Step 5: Solve for x
   x = 58,691,961.86/7,145.76
6. Step 6: Final answer
   x = 8,213.54