Finding the Fourth Proportional to 2,012.12, 3,011.61 and 1,939.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.12 : 3,011.61 = 1,939.87 : x
2. Step 2: Convert to fraction form
   2,012.12/3,011.61 = 1,939.87/x
3. Step 3: Cross multiply
   2,012.12x = 3,011.61 × 1,939.87
4. Step 4: Simplify right side
   2,012.12x = 5,842,142.93
5. Step 5: Solve for x
   x = 5,842,142.93/2,012.12
6. Step 6: Final answer
   x = 2,903.48