Finding the Fourth Proportional to 510,150.58, 765,521.57 and 257,450.83

Step by Step Solution

1. Step 1: Write the proportion equation
   510,150.58 : 765,521.57 = 257,450.83 : x
2. Step 2: Convert to fraction form
   510,150.58/765,521.57 = 257,450.83/x
3. Step 3: Cross multiply
   510,150.58x = 765,521.57 × 257,450.83
4. Step 4: Simplify right side
   510,150.58x = 197,084,162,309.23
5. Step 5: Solve for x
   x = 197,084,162,309.23/510,150.58
6. Step 6: Final answer
   x = 386,325.47