Finding the Fourth Proportional to 259,858.62, 389,801.67 and 82,379.47

Step by Step Solution

1. Step 1: Write the proportion equation
   259,858.62 : 389,801.67 = 82,379.47 : x
2. Step 2: Convert to fraction form
   259,858.62/389,801.67 = 82,379.47/x
3. Step 3: Cross multiply
   259,858.62x = 389,801.67 × 82,379.47
4. Step 4: Simplify right side
   259,858.62x = 32,111,654,979.71
5. Step 5: Solve for x
   x = 32,111,654,979.71/259,858.62
6. Step 6: Final answer
   x = 123,573.56