Finding the Fourth Proportional to 2,115.10, 3,162.93 and 1,872.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.10 : 3,162.93 = 1,872.10 : x
2. Step 2: Convert to fraction form
   2,115.10/3,162.93 = 1,872.10/x
3. Step 3: Cross multiply
   2,115.10x = 3,162.93 × 1,872.10
4. Step 4: Simplify right side
   2,115.10x = 5,921,321.25
5. Step 5: Solve for x
   x = 5,921,321.25/2,115.10
6. Step 6: Final answer
   x = 2,799.55