Finding the Fourth Proportional to 265,469.86, 397,994.28 and 139,085.86

Step by Step Solution

1. Step 1: Write the proportion equation
   265,469.86 : 397,994.28 = 139,085.86 : x
2. Step 2: Convert to fraction form
   265,469.86/397,994.28 = 139,085.86/x
3. Step 3: Cross multiply
   265,469.86x = 397,994.28 × 139,085.86
4. Step 4: Simplify right side
   265,469.86x = 55,355,377,112.10
5. Step 5: Solve for x
   x = 55,355,377,112.10/265,469.86
6. Step 6: Final answer
   x = 208,518.50