Finding the Fourth Proportional to 3,997,128.72, 5,995,637.60 and 964,469.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997,128.72 : 5,995,637.60 = 964,469.28 : x
2. Step 2: Convert to fraction form
   3,997,128.72/5,995,637.60 = 964,469.28/x
3. Step 3: Cross multiply
   3,997,128.72x = 5,995,637.60 × 964,469.28
4. Step 4: Simplify right side
   3,997,128.72x = 5,782,608,279,212.93
5. Step 5: Solve for x
   x = 5,782,608,279,212.93/3,997,128.72
6. Step 6: Final answer
   x = 1,446,690.53