Finding the Fourth Proportional to 384,870.48, 577,399.57 and 271,239.83

Step by Step Solution

1. Step 1: Write the proportion equation
   384,870.48 : 577,399.57 = 271,239.83 : x
2. Step 2: Convert to fraction form
   384,870.48/577,399.57 = 271,239.83/x
3. Step 3: Cross multiply
   384,870.48x = 577,399.57 × 271,239.83
4. Step 4: Simplify right side
   384,870.48x = 156,613,761,208.87
5. Step 5: Solve for x
   x = 156,613,761,208.87/384,870.48
6. Step 6: Final answer
   x = 406,925.89