Finding the Fourth Proportional to 429,399.30, 643,904.55 and 163,071.30

Step by Step Solution

1. Step 1: Write the proportion equation
   429,399.30 : 643,904.55 = 163,071.30 : x
2. Step 2: Convert to fraction form
   429,399.30/643,904.55 = 163,071.30/x
3. Step 3: Cross multiply
   429,399.30x = 643,904.55 × 163,071.30
4. Step 4: Simplify right side
   429,399.30x = 105,002,352,044.42
5. Step 5: Solve for x
   x = 105,002,352,044.42/429,399.30
6. Step 6: Final answer
   x = 244,533.12