Finding the Fourth Proportional to 250,667.61, 345,998.75 and 161,243.61

Step by Step Solution

1. Step 1: Write the proportion equation
   250,667.61 : 345,998.75 = 161,243.61 : x
2. Step 2: Convert to fraction form
   250,667.61/345,998.75 = 161,243.61/x
3. Step 3: Cross multiply
   250,667.61x = 345,998.75 × 161,243.61
4. Step 4: Simplify right side
   250,667.61x = 55,790,086,699.27
5. Step 5: Solve for x
   x = 55,790,086,699.27/250,667.61
6. Step 6: Final answer
   x = 222,566.00