Finding the Fourth Proportional to 2,078.28, 3,116.46 and 1,212.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.28 : 3,116.46 = 1,212.84 : x
2. Step 2: Convert to fraction form
   2,078.28/3,116.46 = 1,212.84/x
3. Step 3: Cross multiply
   2,078.28x = 3,116.46 × 1,212.84
4. Step 4: Simplify right side
   2,078.28x = 3,779,767.35
5. Step 5: Solve for x
   x = 3,779,767.35/2,078.28
6. Step 6: Final answer
   x = 1,818.70