Finding the Fourth Proportional to 338,945.54, 508,411.91 and 82,782.23

Step by Step Solution

1. Step 1: Write the proportion equation
   338,945.54 : 508,411.91 = 82,782.23 : x
2. Step 2: Convert to fraction form
   338,945.54/508,411.91 = 82,782.23/x
3. Step 3: Cross multiply
   338,945.54x = 508,411.91 × 82,782.23
4. Step 4: Simplify right side
   338,945.54x = 42,087,469,333.26
5. Step 5: Solve for x
   x = 42,087,469,333.26/338,945.54
6. Step 6: Final answer
   x = 124,171.78