Finding the Fourth Proportional to 338,900.45, 508,345.81 and 82,736.33

Step by Step Solution

1. Step 1: Write the proportion equation
   338,900.45 : 508,345.81 = 82,736.33 : x
2. Step 2: Convert to fraction form
   338,900.45/508,345.81 = 82,736.33/x
3. Step 3: Cross multiply
   338,900.45x = 508,345.81 × 82,736.33
4. Step 4: Simplify right side
   338,900.45x = 42,058,663,941.71
5. Step 5: Solve for x
   x = 42,058,663,941.71/338,900.45
6. Step 6: Final answer
   x = 124,103.30