Finding the Fourth Proportional to 285,196.72, 428,570.52 and 152,170.96

Step by Step Solution

1. Step 1: Write the proportion equation
   285,196.72 : 428,570.52 = 152,170.96 : x
2. Step 2: Convert to fraction form
   285,196.72/428,570.52 = 152,170.96/x
3. Step 3: Cross multiply
   285,196.72x = 428,570.52 × 152,170.96
4. Step 4: Simplify right side
   285,196.72x = 65,215,987,456.10
5. Step 5: Solve for x
   x = 65,215,987,456.10/285,196.72
6. Step 6: Final answer
   x = 228,670.19