Finding the Fourth Proportional to 855,105.49, 1,280,101.06 and 517,123.27

Step by Step Solution

1. Step 1: Write the proportion equation
   855,105.49 : 1,280,101.06 = 517,123.27 : x
2. Step 2: Convert to fraction form
   855,105.49/1,280,101.06 = 517,123.27/x
3. Step 3: Cross multiply
   855,105.49x = 1,280,101.06 × 517,123.27
4. Step 4: Simplify right side
   855,105.49x = 661,970,046,077.67
5. Step 5: Solve for x
   x = 661,970,046,077.67/855,105.49
6. Step 6: Final answer
   x = 774,138.46