Finding the Fourth Proportional to 2,086.32, 3,128.40 and 1,112.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.32 : 3,128.40 = 1,112.16 : x
2. Step 2: Convert to fraction form
   2,086.32/3,128.40 = 1,112.16/x
3. Step 3: Cross multiply
   2,086.32x = 3,128.40 × 1,112.16
4. Step 4: Simplify right side
   2,086.32x = 3,479,281.34
5. Step 5: Solve for x
   x = 3,479,281.34/2,086.32
6. Step 6: Final answer
   x = 1,667.66