Finding the Fourth Proportional to 498,485.34, 687,906.27 and 272,130.84

Step by Step Solution

1. Step 1: Write the proportion equation
   498,485.34 : 687,906.27 = 272,130.84 : x
2. Step 2: Convert to fraction form
   498,485.34/687,906.27 = 272,130.84/x
3. Step 3: Cross multiply
   498,485.34x = 687,906.27 × 272,130.84
4. Step 4: Simplify right side
   498,485.34x = 187,200,511,096.37
5. Step 5: Solve for x
   x = 187,200,511,096.37/498,485.34
6. Step 6: Final answer
   x = 375,538.65