Finding the Fourth Proportional to 258,297.80, 387,499.89 and 108,449.96

Step by Step Solution

1. Step 1: Write the proportion equation
   258,297.80 : 387,499.89 = 108,449.96 : x
2. Step 2: Convert to fraction form
   258,297.80/387,499.89 = 108,449.96/x
3. Step 3: Cross multiply
   258,297.80x = 387,499.89 × 108,449.96
4. Step 4: Simplify right side
   258,297.80x = 42,024,347,570.50
5. Step 5: Solve for x
   x = 42,024,347,570.50/258,297.80
6. Step 6: Final answer
   x = 162,697.27