Finding the Fourth Proportional to 835,630.72, 1,152,056.72 and 664,121.28

Step by Step Solution

1. Step 1: Write the proportion equation
   835,630.72 : 1,152,056.72 = 664,121.28 : x
2. Step 2: Convert to fraction form
   835,630.72/1,152,056.72 = 664,121.28/x
3. Step 3: Cross multiply
   835,630.72x = 1,152,056.72 × 664,121.28
4. Step 4: Simplify right side
   835,630.72x = 765,105,383,519.00
5. Step 5: Solve for x
   x = 765,105,383,519.00/835,630.72
6. Step 6: Final answer
   x = 915,602.27