Finding the Fourth Proportional to 155,149.43, 214,105.68 and 87,168.15

Step by Step Solution

1. Step 1: Write the proportion equation
   155,149.43 : 214,105.68 = 87,168.15 : x
2. Step 2: Convert to fraction form
   155,149.43/214,105.68 = 87,168.15/x
3. Step 3: Cross multiply
   155,149.43x = 214,105.68 × 87,168.15
4. Step 4: Simplify right side
   155,149.43x = 18,663,196,030.09
5. Step 5: Solve for x
   x = 18,663,196,030.09/155,149.43
6. Step 6: Final answer
   x = 120,291.75