Finding the Fourth Proportional to 647,632.80, 971,028.72 and 310,665.60

Step by Step Solution

1. Step 1: Write the proportion equation
   647,632.80 : 971,028.72 = 310,665.60 : x
2. Step 2: Convert to fraction form
   647,632.80/971,028.72 = 310,665.60/x
3. Step 3: Cross multiply
   647,632.80x = 971,028.72 × 310,665.60
4. Step 4: Simplify right side
   647,632.80x = 301,665,219,916.03
5. Step 5: Solve for x
   x = 301,665,219,916.03/647,632.80
6. Step 6: Final answer
   x = 465,796.70