Finding the Fourth Proportional to 3,436.63, 5,155.40 and 971.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.63 : 5,155.40 = 971.39 : x
2. Step 2: Convert to fraction form
   3,436.63/5,155.40 = 971.39/x
3. Step 3: Cross multiply
   3,436.63x = 5,155.40 × 971.39
4. Step 4: Simplify right side
   3,436.63x = 5,007,913.86
5. Step 5: Solve for x
   x = 5,007,913.86/3,436.63
6. Step 6: Final answer
   x = 1,457.22