Finding the Fourth Proportional to 259,858.49, 389,801.50 and 82,379.35

Step by Step Solution

1. Step 1: Write the proportion equation
   259,858.49 : 389,801.50 = 82,379.35 : x
2. Step 2: Convert to fraction form
   259,858.49/389,801.50 = 82,379.35/x
3. Step 3: Cross multiply
   259,858.49x = 389,801.50 × 82,379.35
4. Step 4: Simplify right side
   259,858.49x = 32,111,593,018.57
5. Step 5: Solve for x
   x = 32,111,593,018.57/259,858.49
6. Step 6: Final answer
   x = 123,573.38