Finding the Fourth Proportional to 4,960.21, 7,428.59 and 4,307.45

Step by Step Solution

1. Step 1: Write the proportion equation
   4,960.21 : 7,428.59 = 4,307.45 : x
2. Step 2: Convert to fraction form
   4,960.21/7,428.59 = 4,307.45/x
3. Step 3: Cross multiply
   4,960.21x = 7,428.59 × 4,307.45
4. Step 4: Simplify right side
   4,960.21x = 31,998,288.03
5. Step 5: Solve for x
   x = 31,998,288.03/4,960.21
6. Step 6: Final answer
   x = 6,450.99