Finding the Fourth Proportional to 259,969.93, 389,968.73 and 82,490.83

Step by Step Solution

1. Step 1: Write the proportion equation
   259,969.93 : 389,968.73 = 82,490.83 : x
2. Step 2: Convert to fraction form
   259,969.93/389,968.73 = 82,490.83/x
3. Step 3: Cross multiply
   259,969.93x = 389,968.73 × 82,490.83
4. Step 4: Simplify right side
   259,969.93x = 32,168,841,849.45
5. Step 5: Solve for x
   x = 32,168,841,849.45/259,969.93
6. Step 6: Final answer
   x = 123,740.63