Finding the Fourth Proportional to 835,128.78, 1,252,692.56 and 479,916.24

Step by Step Solution

1. Step 1: Write the proportion equation
   835,128.78 : 1,252,692.56 = 479,916.24 : x
2. Step 2: Convert to fraction form
   835,128.78/1,252,692.56 = 479,916.24/x
3. Step 3: Cross multiply
   835,128.78x = 1,252,692.56 × 479,916.24
4. Step 4: Simplify right side
   835,128.78x = 601,187,500,871.59
5. Step 5: Solve for x
   x = 601,187,500,871.59/835,128.78
6. Step 6: Final answer
   x = 719,874.01