Finding the Fourth Proportional to 65,107.20, 88,171.20 and 65,107.20

Step by Step Solution

1. Step 1: Write the proportion equation
   65,107.20 : 88,171.20 = 65,107.20 : x
2. Step 2: Convert to fraction form
   65,107.20/88,171.20 = 65,107.20/x
3. Step 3: Cross multiply
   65,107.20x = 88,171.20 × 65,107.20
4. Step 4: Simplify right side
   65,107.20x = 5,740,579,952.64
5. Step 5: Solve for x
   x = 5,740,579,952.64/65,107.20
6. Step 6: Final answer
   x = 88,171.20