Finding the Fourth Proportional to 2,108.16, 3,162.15 and 1,247.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.16 : 3,162.15 = 1,247.94 : x
2. Step 2: Convert to fraction form
   2,108.16/3,162.15 = 1,247.94/x
3. Step 3: Cross multiply
   2,108.16x = 3,162.15 × 1,247.94
4. Step 4: Simplify right side
   2,108.16x = 3,946,173.47
5. Step 5: Solve for x
   x = 3,946,173.47/2,108.16
6. Step 6: Final answer
   x = 1,871.86