Finding the Fourth Proportional to 429,224.86, 643,399.89 and 192,503.98

Step by Step Solution

1. Step 1: Write the proportion equation
   429,224.86 : 643,399.89 = 192,503.98 : x
2. Step 2: Convert to fraction form
   429,224.86/643,399.89 = 192,503.98/x
3. Step 3: Cross multiply
   429,224.86x = 643,399.89 × 192,503.98
4. Step 4: Simplify right side
   429,224.86x = 123,857,039,556.56
5. Step 5: Solve for x
   x = 123,857,039,556.56/429,224.86
6. Step 6: Final answer
   x = 288,559.80