Finding the Fourth Proportional to 258,297.30, 387,499.14 and 108,449.46

Step by Step Solution

1. Step 1: Write the proportion equation
   258,297.30 : 387,499.14 = 108,449.46 : x
2. Step 2: Convert to fraction form
   258,297.30/387,499.14 = 108,449.46/x
3. Step 3: Cross multiply
   258,297.30x = 387,499.14 × 108,449.46
4. Step 4: Simplify right side
   258,297.30x = 42,024,072,483.46
5. Step 5: Solve for x
   x = 42,024,072,483.46/258,297.30
6. Step 6: Final answer
   x = 162,696.52