Finding the Fourth Proportional to 171,080.64, 256,662.78 and 120,578.15

Step by Step Solution

1. Step 1: Write the proportion equation
   171,080.64 : 256,662.78 = 120,578.15 : x
2. Step 2: Convert to fraction form
   171,080.64/256,662.78 = 120,578.15/x
3. Step 3: Cross multiply
   171,080.64x = 256,662.78 × 120,578.15
4. Step 4: Simplify right side
   171,080.64x = 30,947,923,375.75
5. Step 5: Solve for x
   x = 30,947,923,375.75/171,080.64
6. Step 6: Final answer
   x = 180,896.70