Finding the Fourth Proportional to 3,436.75, 5,155.17 and 971.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.75 : 5,155.17 = 971.61 : x
2. Step 2: Convert to fraction form
   3,436.75/5,155.17 = 971.61/x
3. Step 3: Cross multiply
   3,436.75x = 5,155.17 × 971.61
4. Step 4: Simplify right side
   3,436.75x = 5,008,814.72
5. Step 5: Solve for x
   x = 5,008,814.72/3,436.75
6. Step 6: Final answer
   x = 1,457.43