Finding the Fourth Proportional to 2,106.96, 3,158.28 and 1,009.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.96 : 3,158.28 = 1,009.68 : x
2. Step 2: Convert to fraction form
   2,106.96/3,158.28 = 1,009.68/x
3. Step 3: Cross multiply
   2,106.96x = 3,158.28 × 1,009.68
4. Step 4: Simplify right side
   2,106.96x = 3,188,852.15
5. Step 5: Solve for x
   x = 3,188,852.15/2,106.96
6. Step 6: Final answer
   x = 1,513.48