Finding the Fourth Proportional to 429,667.72, 644,501.82 and 163,366.72

Step by Step Solution

1. Step 1: Write the proportion equation
   429,667.72 : 644,501.82 = 163,366.72 : x
2. Step 2: Convert to fraction form
   429,667.72/644,501.82 = 163,366.72/x
3. Step 3: Cross multiply
   429,667.72x = 644,501.82 × 163,366.72
4. Step 4: Simplify right side
   429,667.72x = 105,290,148,367.43
5. Step 5: Solve for x
   x = 105,290,148,367.43/429,667.72
6. Step 6: Final answer
   x = 245,050.17