Finding the Fourth Proportional to 138,945.92, 208,697.85 and 82,895.37

Step by Step Solution

1. Step 1: Write the proportion equation
   138,945.92 : 208,697.85 = 82,895.37 : x
2. Step 2: Convert to fraction form
   138,945.92/208,697.85 = 82,895.37/x
3. Step 3: Cross multiply
   138,945.92x = 208,697.85 × 82,895.37
4. Step 4: Simplify right side
   138,945.92x = 17,300,085,493.95
5. Step 5: Solve for x
   x = 17,300,085,493.95/138,945.92
6. Step 6: Final answer
   x = 124,509.49