Finding the Fourth Proportional to 2,103.17, 3,151.98 and 1,280.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.17 : 3,151.98 = 1,280.34 : x
2. Step 2: Convert to fraction form
   2,103.17/3,151.98 = 1,280.34/x
3. Step 3: Cross multiply
   2,103.17x = 3,151.98 × 1,280.34
4. Step 4: Simplify right side
   2,103.17x = 4,035,606.07
5. Step 5: Solve for x
   x = 4,035,606.07/2,103.17
6. Step 6: Final answer
   x = 1,918.83