Finding the Fourth Proportional to 290,233.50, 400,508.72 and 161,180.15

Step by Step Solution

1. Step 1: Write the proportion equation
   290,233.50 : 400,508.72 = 161,180.15 : x
2. Step 2: Convert to fraction form
   290,233.50/400,508.72 = 161,180.15/x
3. Step 3: Cross multiply
   290,233.50x = 400,508.72 × 161,180.15
4. Step 4: Simplify right side
   290,233.50x = 64,554,053,361.89
5. Step 5: Solve for x
   x = 64,554,053,361.89/290,233.50
6. Step 6: Final answer
   x = 222,421.10