Finding the Fourth Proportional to 258,488.63, 387,760.76 and 108,744.15

Step by Step Solution

1. Step 1: Write the proportion equation
   258,488.63 : 387,760.76 = 108,744.15 : x
2. Step 2: Convert to fraction form
   258,488.63/387,760.76 = 108,744.15/x
3. Step 3: Cross multiply
   258,488.63x = 387,760.76 × 108,744.15
4. Step 4: Simplify right side
   258,488.63x = 42,166,713,705.83
5. Step 5: Solve for x
   x = 42,166,713,705.83/258,488.63
6. Step 6: Final answer
   x = 163,127.93