Finding the Fourth Proportional to 318,959.16, 478,440.83 and 82,303.89

Step by Step Solution

1. Step 1: Write the proportion equation
   318,959.16 : 478,440.83 = 82,303.89 : x
2. Step 2: Convert to fraction form
   318,959.16/478,440.83 = 82,303.89/x
3. Step 3: Cross multiply
   318,959.16x = 478,440.83 × 82,303.89
4. Step 4: Simplify right side
   318,959.16x = 39,377,541,443.83
5. Step 5: Solve for x
   x = 39,377,541,443.83/318,959.16
6. Step 6: Final answer
   x = 123,456.37