Finding the Fourth Proportional to 2,018.47, 3,011.31 and 1,909.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.47 : 3,011.31 = 1,909.48 : x
2. Step 2: Convert to fraction form
   2,018.47/3,011.31 = 1,909.48/x
3. Step 3: Cross multiply
   2,018.47x = 3,011.31 × 1,909.48
4. Step 4: Simplify right side
   2,018.47x = 5,750,036.22
5. Step 5: Solve for x
   x = 5,750,036.22/2,018.47
6. Step 6: Final answer
   x = 2,848.71