Finding the Fourth Proportional to 2,627.92, 3,937.47 and 1,309.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.92 : 3,937.47 = 1,309.87 : x
2. Step 2: Convert to fraction form
   2,627.92/3,937.47 = 1,309.87/x
3. Step 3: Cross multiply
   2,627.92x = 3,937.47 × 1,309.87
4. Step 4: Simplify right side
   2,627.92x = 5,157,573.83
5. Step 5: Solve for x
   x = 5,157,573.83/2,627.92
6. Step 6: Final answer
   x = 1,962.61