Finding the Fourth Proportional to 69,469.39, 103,918.64 and 55,456.79

Step by Step Solution

1. Step 1: Write the proportion equation
   69,469.39 : 103,918.64 = 55,456.79 : x
2. Step 2: Convert to fraction form
   69,469.39/103,918.64 = 55,456.79/x
3. Step 3: Cross multiply
   69,469.39x = 103,918.64 × 55,456.79
4. Step 4: Simplify right side
   69,469.39x = 5,762,993,398.69
5. Step 5: Solve for x
   x = 5,762,993,398.69/69,469.39
6. Step 6: Final answer
   x = 82,957.30