Finding the Fourth Proportional to 290,196.74, 400,491.34 and 161,141.88

Step by Step Solution

1. Step 1: Write the proportion equation
   290,196.74 : 400,491.34 = 161,141.88 : x
2. Step 2: Convert to fraction form
   290,196.74/400,491.34 = 161,141.88/x
3. Step 3: Cross multiply
   290,196.74x = 400,491.34 × 161,141.88
4. Step 4: Simplify right side
   290,196.74x = 64,535,927,451.32
5. Step 5: Solve for x
   x = 64,535,927,451.32/290,196.74
6. Step 6: Final answer
   x = 222,386.81