Finding the Fourth Proportional to 155,150.43, 214,107.06 and 87,169.15

Step by Step Solution

1. Step 1: Write the proportion equation
   155,150.43 : 214,107.06 = 87,169.15 : x
2. Step 2: Convert to fraction form
   155,150.43/214,107.06 = 87,169.15/x
3. Step 3: Cross multiply
   155,150.43x = 214,107.06 × 87,169.15
4. Step 4: Simplify right side
   155,150.43x = 18,663,530,429.20
5. Step 5: Solve for x
   x = 18,663,530,429.20/155,150.43
6. Step 6: Final answer
   x = 120,293.13