Finding the Fourth Proportional to 2,113.58, 3,171.05 and 1,018.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.58 : 3,171.05 = 1,018.06 : x
2. Step 2: Convert to fraction form
   2,113.58/3,171.05 = 1,018.06/x
3. Step 3: Cross multiply
   2,113.58x = 3,171.05 × 1,018.06
4. Step 4: Simplify right side
   2,113.58x = 3,228,309.96
5. Step 5: Solve for x
   x = 3,228,309.96/2,113.58
6. Step 6: Final answer
   x = 1,527.41