Finding the Fourth Proportional to 69,906.72, 104,772.56 and 55,057

Step by Step Solution

1. Step 1: Write the proportion equation
   69,906.72 : 104,772.56 = 55,057 : x
2. Step 2: Convert to fraction form
   69,906.72/104,772.56 = 55,057/x
3. Step 3: Cross multiply
   69,906.72x = 104,772.56 × 55,057
4. Step 4: Simplify right side
   69,906.72x = 5,768,462,835.92
5. Step 5: Solve for x
   x = 5,768,462,835.92/69,906.72
6. Step 6: Final answer
   x = 82,516.57