Finding the Fourth Proportional to 265,470.86, 397,995.79 and 139,086.86

Step by Step Solution

1. Step 1: Write the proportion equation
   265,470.86 : 397,995.79 = 139,086.86 : x
2. Step 2: Convert to fraction form
   265,470.86/397,995.79 = 139,086.86/x
3. Step 3: Cross multiply
   265,470.86x = 397,995.79 × 139,086.86
4. Step 4: Simplify right side
   265,470.86x = 55,355,984,028.89
5. Step 5: Solve for x
   x = 55,355,984,028.89/265,470.86
6. Step 6: Final answer
   x = 208,520.01