Finding the Fourth Proportional to 726,500.05, 1,002,554.42 and 420,589.37

Step by Step Solution

1. Step 1: Write the proportion equation
   726,500.05 : 1,002,554.42 = 420,589.37 : x
2. Step 2: Convert to fraction form
   726,500.05/1,002,554.42 = 420,589.37/x
3. Step 3: Cross multiply
   726,500.05x = 1,002,554.42 × 420,589.37
4. Step 4: Simplify right side
   726,500.05x = 421,663,731,898.52
5. Step 5: Solve for x
   x = 421,663,731,898.52/726,500.05
6. Step 6: Final answer
   x = 580,404.27