Finding the Fourth Proportional to 3,912.06, 5,867.72 and 1,315.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.06 : 5,867.72 = 1,315.02 : x
2. Step 2: Convert to fraction form
   3,912.06/5,867.72 = 1,315.02/x
3. Step 3: Cross multiply
   3,912.06x = 5,867.72 × 1,315.02
4. Step 4: Simplify right side
   3,912.06x = 7,716,169.15
5. Step 5: Solve for x
   x = 7,716,169.15/3,912.06
6. Step 6: Final answer
   x = 1,972.41