Finding the Fourth Proportional to 290,466.71, 400,881.69 and 163,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   290,466.71 : 400,881.69 = 163,142.31 : x
2. Step 2: Convert to fraction form
   290,466.71/400,881.69 = 163,142.31/x
3. Step 3: Cross multiply
   290,466.71x = 400,881.69 × 163,142.31
4. Step 4: Simplify right side
   290,466.71x = 65,400,764,127.59
5. Step 5: Solve for x
   x = 65,400,764,127.59/290,466.71
6. Step 6: Final answer
   x = 225,157.52