Finding the Fourth Proportional to 172,412.06, 258,607.35 and 82,518.62

Step by Step Solution

1. Step 1: Write the proportion equation
   172,412.06 : 258,607.35 = 82,518.62 : x
2. Step 2: Convert to fraction form
   172,412.06/258,607.35 = 82,518.62/x
3. Step 3: Cross multiply
   172,412.06x = 258,607.35 × 82,518.62
4. Step 4: Simplify right side
   172,412.06x = 21,339,920,350.82
5. Step 5: Solve for x
   x = 21,339,920,350.82/172,412.06
6. Step 6: Final answer
   x = 123,772.79