Finding the Fourth Proportional to 362,146.72, 499,786.35 and 209,191.35

Step by Step Solution

1. Step 1: Write the proportion equation
   362,146.72 : 499,786.35 = 209,191.35 : x
2. Step 2: Convert to fraction form
   362,146.72/499,786.35 = 209,191.35/x
3. Step 3: Cross multiply
   362,146.72x = 499,786.35 × 209,191.35
4. Step 4: Simplify right side
   362,146.72x = 104,550,978,609.41
5. Step 5: Solve for x
   x = 104,550,978,609.41/362,146.72
6. Step 6: Final answer
   x = 288,697.85