Finding the Fourth Proportional to 290,072.82, 400,294.22 and 161,003.72

Step by Step Solution

1. Step 1: Write the proportion equation
   290,072.82 : 400,294.22 = 161,003.72 : x
2. Step 2: Convert to fraction form
   290,072.82/400,294.22 = 161,003.72/x
3. Step 3: Cross multiply
   290,072.82x = 400,294.22 × 161,003.72
4. Step 4: Simplify right side
   290,072.82x = 64,448,858,514.50
5. Step 5: Solve for x
   x = 64,448,858,514.50/290,072.82
6. Step 6: Final answer
   x = 222,181.65