Finding the Fourth Proportional to 2,113.90, 3,171.53 and 1,018.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.90 : 3,171.53 = 1,018.34 : x
2. Step 2: Convert to fraction form
   2,113.90/3,171.53 = 1,018.34/x
3. Step 3: Cross multiply
   2,113.90x = 3,171.53 × 1,018.34
4. Step 4: Simplify right side
   2,113.90x = 3,229,695.86
5. Step 5: Solve for x
   x = 3,229,695.86/2,113.90
6. Step 6: Final answer
   x = 1,527.84