Finding the Fourth Proportional to 172,082, 258,132.72 and 61,274

Step by Step Solution

1. Step 1: Write the proportion equation
   172,082 : 258,132.72 = 61,274 : x
2. Step 2: Convert to fraction form
   172,082/258,132.72 = 61,274/x
3. Step 3: Cross multiply
   172,082x = 258,132.72 × 61,274
4. Step 4: Simplify right side
   172,082x = 15,816,824,285.28
5. Step 5: Solve for x
   x = 15,816,824,285.28/172,082
6. Step 6: Final answer
   x = 91,914.46