Finding the Fourth Proportional to 728,939.68, 1,005,812.16 and 422,945.91

Step by Step Solution

1. Step 1: Write the proportion equation
   728,939.68 : 1,005,812.16 = 422,945.91 : x
2. Step 2: Convert to fraction form
   728,939.68/1,005,812.16 = 422,945.91/x
3. Step 3: Cross multiply
   728,939.68x = 1,005,812.16 × 422,945.91
4. Step 4: Simplify right side
   728,939.68x = 425,404,139,300.27
5. Step 5: Solve for x
   x = 425,404,139,300.27/728,939.68
6. Step 6: Final answer
   x = 583,593.06