Finding the Fourth Proportional to 259,969.43, 389,967.98 and 82,490.33

Step by Step Solution

1. Step 1: Write the proportion equation
   259,969.43 : 389,967.98 = 82,490.33 : x
2. Step 2: Convert to fraction form
   259,969.43/389,967.98 = 82,490.33/x
3. Step 3: Cross multiply
   259,969.43x = 389,967.98 × 82,490.33
4. Step 4: Simplify right side
   259,969.43x = 32,168,584,997.34
5. Step 5: Solve for x
   x = 32,168,584,997.34/259,969.43
6. Step 6: Final answer
   x = 123,739.88