Finding the Fourth Proportional to 628,128.27, 866,738.34 and 424,621.98

Step by Step Solution

1. Step 1: Write the proportion equation
   628,128.27 : 866,738.34 = 424,621.98 : x
2. Step 2: Convert to fraction form
   628,128.27/866,738.34 = 424,621.98/x
3. Step 3: Cross multiply
   628,128.27x = 866,738.34 × 424,621.98
4. Step 4: Simplify right side
   628,128.27x = 368,036,150,072.71
5. Step 5: Solve for x
   x = 368,036,150,072.71/628,128.27
6. Step 6: Final answer
   x = 585,925.15