Finding the Fourth Proportional to 7,709.04, 10,617.12 and 7,164.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,709.04 : 10,617.12 = 7,164.72 : x
2. Step 2: Convert to fraction form
   7,709.04/10,617.12 = 7,164.72/x
3. Step 3: Cross multiply
   7,709.04x = 10,617.12 × 7,164.72
4. Step 4: Simplify right side
   7,709.04x = 76,068,692.01
5. Step 5: Solve for x
   x = 76,068,692.01/7,709.04
6. Step 6: Final answer
   x = 9,867.47