Finding the Fourth Proportional to 429,668.72, 644,503.32 and 163,367.72

Step by Step Solution

1. Step 1: Write the proportion equation
   429,668.72 : 644,503.32 = 163,367.72 : x
2. Step 2: Convert to fraction form
   429,668.72/644,503.32 = 163,367.72/x
3. Step 3: Cross multiply
   429,668.72x = 644,503.32 × 163,367.72
4. Step 4: Simplify right side
   429,668.72x = 105,291,037,920.83
5. Step 5: Solve for x
   x = 105,291,037,920.83/429,668.72
6. Step 6: Final answer
   x = 245,051.67