Finding the Fourth Proportional to 172,839.20, 259,100.84 and 146,355.72

Step by Step Solution

1. Step 1: Write the proportion equation
   172,839.20 : 259,100.84 = 146,355.72 : x
2. Step 2: Convert to fraction form
   172,839.20/259,100.84 = 146,355.72/x
3. Step 3: Cross multiply
   172,839.20x = 259,100.84 × 146,355.72
4. Step 4: Simplify right side
   172,839.20x = 37,920,889,990.80
5. Step 5: Solve for x
   x = 37,920,889,990.80/172,839.20
6. Step 6: Final answer
   x = 219,399.82