Finding the Fourth Proportional to 2,114.34, 3,168.09 and 1,290.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.34 : 3,168.09 = 1,290.12 : x
2. Step 2: Convert to fraction form
   2,114.34/3,168.09 = 1,290.12/x
3. Step 3: Cross multiply
   2,114.34x = 3,168.09 × 1,290.12
4. Step 4: Simplify right side
   2,114.34x = 4,087,216.27
5. Step 5: Solve for x
   x = 4,087,216.27/2,114.34
6. Step 6: Final answer
   x = 1,933.09