Finding the Fourth Proportional to 8,665.72, 13,002.18 and 4,769.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,665.72 : 13,002.18 = 4,769.80 : x
2. Step 2: Convert to fraction form
   8,665.72/13,002.18 = 4,769.80/x
3. Step 3: Cross multiply
   8,665.72x = 13,002.18 × 4,769.80
4. Step 4: Simplify right side
   8,665.72x = 62,017,798.16
5. Step 5: Solve for x
   x = 62,017,798.16/8,665.72
6. Step 6: Final answer
   x = 7,156.68