Finding the Fourth Proportional to 290,444.72, 400,812.42 and 161,404.22

Step by Step Solution

1. Step 1: Write the proportion equation
   290,444.72 : 400,812.42 = 161,404.22 : x
2. Step 2: Convert to fraction form
   290,444.72/400,812.42 = 161,404.22/x
3. Step 3: Cross multiply
   290,444.72x = 400,812.42 × 161,404.22
4. Step 4: Simplify right side
   290,444.72x = 64,692,816,016.41
5. Step 5: Solve for x
   x = 64,692,816,016.41/290,444.72
6. Step 6: Final answer
   x = 222,737.10