Finding the Fourth Proportional to 499,636.50, 689,498.37 and 273,282

Step by Step Solution

1. Step 1: Write the proportion equation
   499,636.50 : 689,498.37 = 273,282 : x
2. Step 2: Convert to fraction form
   499,636.50/689,498.37 = 273,282/x
3. Step 3: Cross multiply
   499,636.50x = 689,498.37 × 273,282
4. Step 4: Simplify right side
   499,636.50x = 188,427,493,550.34
5. Step 5: Solve for x
   x = 188,427,493,550.34/499,636.50
6. Step 6: Final answer
   x = 377,129.16