Finding the Fourth Proportional to 49,399.20, 69,290.10 and 49,399.20

Step by Step Solution

1. Step 1: Write the proportion equation
   49,399.20 : 69,290.10 = 49,399.20 : x
2. Step 2: Convert to fraction form
   49,399.20/69,290.10 = 49,399.20/x
3. Step 3: Cross multiply
   49,399.20x = 69,290.10 × 49,399.20
4. Step 4: Simplify right side
   49,399.20x = 3,422,875,507.92
5. Step 5: Solve for x
   x = 3,422,875,507.92/49,399.20
6. Step 6: Final answer
   x = 69,290.10