Finding the Fourth Proportional to 257,564.74, 386,401.83 and 80,067.46

Step by Step Solution

1. Step 1: Write the proportion equation
   257,564.74 : 386,401.83 = 80,067.46 : x
2. Step 2: Convert to fraction form
   257,564.74/386,401.83 = 80,067.46/x
3. Step 3: Cross multiply
   257,564.74x = 386,401.83 × 80,067.46
4. Step 4: Simplify right side
   257,564.74x = 30,938,213,067.45
5. Step 5: Solve for x
   x = 30,938,213,067.45/257,564.74
6. Step 6: Final answer
   x = 120,118.20