Finding the Fourth Proportional to 3,912.55, 5,867.60 and 1,314.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.55 : 5,867.60 = 1,314.88 : x
2. Step 2: Convert to fraction form
   3,912.55/5,867.60 = 1,314.88/x
3. Step 3: Cross multiply
   3,912.55x = 5,867.60 × 1,314.88
4. Step 4: Simplify right side
   3,912.55x = 7,715,189.89
5. Step 5: Solve for x
   x = 7,715,189.89/3,912.55
6. Step 6: Final answer
   x = 1,971.91