Finding the Fourth Proportional to 395,050.72, 545,074.82 and 239,997.50

Step by Step Solution

1. Step 1: Write the proportion equation
   395,050.72 : 545,074.82 = 239,997.50 : x
2. Step 2: Convert to fraction form
   395,050.72/545,074.82 = 239,997.50/x
3. Step 3: Cross multiply
   395,050.72x = 545,074.82 × 239,997.50
4. Step 4: Simplify right side
   395,050.72x = 130,816,594,112.95
5. Step 5: Solve for x
   x = 130,816,594,112.95/395,050.72
6. Step 6: Final answer
   x = 331,138.73