Finding the Fourth Proportional to 505,546.82, 697,659.37 and 287,744.86

Step by Step Solution

1. Step 1: Write the proportion equation
   505,546.82 : 697,659.37 = 287,744.86 : x
2. Step 2: Convert to fraction form
   505,546.82/697,659.37 = 287,744.86/x
3. Step 3: Cross multiply
   505,546.82x = 697,659.37 × 287,744.86
4. Step 4: Simplify right side
   505,546.82x = 200,747,897,748.34
5. Step 5: Solve for x
   x = 200,747,897,748.34/505,546.82
6. Step 6: Final answer
   x = 397,090.62