Finding the Fourth Proportional to 171,196.72, 256,855.80 and 76,418.24

Step by Step Solution

1. Step 1: Write the proportion equation
   171,196.72 : 256,855.80 = 76,418.24 : x
2. Step 2: Convert to fraction form
   171,196.72/256,855.80 = 76,418.24/x
3. Step 3: Cross multiply
   171,196.72x = 256,855.80 × 76,418.24
4. Step 4: Simplify right side
   171,196.72x = 19,628,468,169.79
5. Step 5: Solve for x
   x = 19,628,468,169.79/171,196.72
6. Step 6: Final answer
   x = 114,654.46