Finding the Fourth Proportional to 4,776.17, 6,570.72 and 4,665.60

Step by Step Solution

1. Step 1: Write the proportion equation
   4,776.17 : 6,570.72 = 4,665.60 : x
2. Step 2: Convert to fraction form
   4,776.17/6,570.72 = 4,665.60/x
3. Step 3: Cross multiply
   4,776.17x = 6,570.72 × 4,665.60
4. Step 4: Simplify right side
   4,776.17x = 30,656,351.23
5. Step 5: Solve for x
   x = 30,656,351.23/4,776.17
6. Step 6: Final answer
   x = 6,418.61