Finding the Fourth Proportional to 2,612.73, 3,916.40 and 1,313.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.73 : 3,916.40 = 1,313.49 : x
2. Step 2: Convert to fraction form
   2,612.73/3,916.40 = 1,313.49/x
3. Step 3: Cross multiply
   2,612.73x = 3,916.40 × 1,313.49
4. Step 4: Simplify right side
   2,612.73x = 5,144,145.67
5. Step 5: Solve for x
   x = 5,144,145.67/2,612.73
6. Step 6: Final answer
   x = 1,968.88