Finding the Fourth Proportional to 172,693.72, 258,597.71 and 146,121.67

Step by Step Solution

1. Step 1: Write the proportion equation
   172,693.72 : 258,597.71 = 146,121.67 : x
2. Step 2: Convert to fraction form
   172,693.72/258,597.71 = 146,121.67/x
3. Step 3: Cross multiply
   172,693.72x = 258,597.71 × 146,121.67
4. Step 4: Simplify right side
   172,693.72x = 37,786,730,205.91
5. Step 5: Solve for x
   x = 37,786,730,205.91/172,693.72
6. Step 6: Final answer
   x = 218,807.78