Finding the Fourth Proportional to 69,916.23, 104,786.78 and 55,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,916.23 : 104,786.78 = 55,066.50 : x
2. Step 2: Convert to fraction form
   69,916.23/104,786.78 = 55,066.50/x
3. Step 3: Cross multiply
   69,916.23x = 104,786.78 × 55,066.50
4. Step 4: Simplify right side
   69,916.23x = 5,770,240,945.54
5. Step 5: Solve for x
   x = 5,770,240,945.54/69,916.23
6. Step 6: Final answer
   x = 82,530.78