Finding the Fourth Proportional to 497,499.80, 686,568.76 and 271,145.30

Step by Step Solution

1. Step 1: Write the proportion equation
   497,499.80 : 686,568.76 = 271,145.30 : x
2. Step 2: Convert to fraction form
   497,499.80/686,568.76 = 271,145.30/x
3. Step 3: Cross multiply
   497,499.80x = 686,568.76 × 271,145.30
4. Step 4: Simplify right side
   497,499.80x = 186,159,892,400.83
5. Step 5: Solve for x
   x = 186,159,892,400.83/497,499.80
6. Step 6: Final answer
   x = 374,190.89