Finding the Fourth Proportional to 361,839.52, 499,273.98 and 218,503.60

Step by Step Solution

1. Step 1: Write the proportion equation
   361,839.52 : 499,273.98 = 218,503.60 : x
2. Step 2: Convert to fraction form
   361,839.52/499,273.98 = 218,503.60/x
3. Step 3: Cross multiply
   361,839.52x = 499,273.98 × 218,503.60
4. Step 4: Simplify right side
   361,839.52x = 109,093,162,016.33
5. Step 5: Solve for x
   x = 109,093,162,016.33/361,839.52
6. Step 6: Final answer
   x = 301,495.98