Finding the Fourth Proportional to 2,106.72, 3,160.88 and 1,865.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.72 : 3,160.88 = 1,865.32 : x
2. Step 2: Convert to fraction form
   2,106.72/3,160.88 = 1,865.32/x
3. Step 3: Cross multiply
   2,106.72x = 3,160.88 × 1,865.32
4. Step 4: Simplify right side
   2,106.72x = 5,896,052.68
5. Step 5: Solve for x
   x = 5,896,052.68/2,106.72
6. Step 6: Final answer
   x = 2,798.69