Finding the Fourth Proportional to 2,987.01, 4,478.31 and 2,011.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.01 : 4,478.31 = 2,011.05 : x
2. Step 2: Convert to fraction form
   2,987.01/4,478.31 = 2,011.05/x
3. Step 3: Cross multiply
   2,987.01x = 4,478.31 × 2,011.05
4. Step 4: Simplify right side
   2,987.01x = 9,006,105.33
5. Step 5: Solve for x
   x = 9,006,105.33/2,987.01
6. Step 6: Final answer
   x = 3,015.09