Finding the Fourth Proportional to 258,275.60, 387,351.72 and 108,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   258,275.60 : 387,351.72 = 108,518.72 : x
2. Step 2: Convert to fraction form
   258,275.60/387,351.72 = 108,518.72/x
3. Step 3: Cross multiply
   258,275.60x = 387,351.72 × 108,518.72
4. Step 4: Simplify right side
   258,275.60x = 42,034,912,844.20
5. Step 5: Solve for x
   x = 42,034,912,844.20/258,275.60
6. Step 6: Final answer
   x = 162,752.16