Finding the Fourth Proportional to 726,499.05, 1,002,553.04 and 420,588.37

Step by Step Solution

1. Step 1: Write the proportion equation
   726,499.05 : 1,002,553.04 = 420,588.37 : x
2. Step 2: Convert to fraction form
   726,499.05/1,002,553.04 = 420,588.37/x
3. Step 3: Cross multiply
   726,499.05x = 1,002,553.04 × 420,588.37
4. Step 4: Simplify right side
   726,499.05x = 421,662,151,236.81
5. Step 5: Solve for x
   x = 421,662,151,236.81/726,499.05
6. Step 6: Final answer
   x = 580,402.90