Finding the Fourth Proportional to 285,186.72, 428,555.52 and 152,160.96

Step by Step Solution

1. Step 1: Write the proportion equation
   285,186.72 : 428,555.52 = 152,160.96 : x
2. Step 2: Convert to fraction form
   285,186.72/428,555.52 = 152,160.96/x
3. Step 3: Cross multiply
   285,186.72x = 428,555.52 × 152,160.96
4. Step 4: Simplify right side
   285,186.72x = 65,209,419,336.50
5. Step 5: Solve for x
   x = 65,209,419,336.50/285,186.72
6. Step 6: Final answer
   x = 228,655.17