Finding the Fourth Proportional to 2,406.72, 3,612.60 and 1,313.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.72 : 3,612.60 = 1,313.28 : x
2. Step 2: Convert to fraction form
   2,406.72/3,612.60 = 1,313.28/x
3. Step 3: Cross multiply
   2,406.72x = 3,612.60 × 1,313.28
4. Step 4: Simplify right side
   2,406.72x = 4,744,355.33
5. Step 5: Solve for x
   x = 4,744,355.33/2,406.72
6. Step 6: Final answer
   x = 1,971.30