Finding the Fourth Proportional to 3,436.73, 5,155.05 and 839.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.73 : 5,155.05 = 839.69 : x
2. Step 2: Convert to fraction form
   3,436.73/5,155.05 = 839.69/x
3. Step 3: Cross multiply
   3,436.73x = 5,155.05 × 839.69
4. Step 4: Simplify right side
   3,436.73x = 4,328,643.93
5. Step 5: Solve for x
   x = 4,328,643.93/3,436.73
6. Step 6: Final answer
   x = 1,259.52