Finding the Fourth Proportional to 2,612.76, 3,916.89 and 1,315.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.76 : 3,916.89 = 1,315.14 : x
2. Step 2: Convert to fraction form
   2,612.76/3,916.89 = 1,315.14/x
3. Step 3: Cross multiply
   2,612.76x = 3,916.89 × 1,315.14
4. Step 4: Simplify right side
   2,612.76x = 5,151,258.71
5. Step 5: Solve for x
   x = 5,151,258.71/2,612.76
6. Step 6: Final answer
   x = 1,971.58