Finding the Fourth Proportional to 2,111.56, 3,162.30 and 1,801.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.56 : 3,162.30 = 1,801.72 : x
2. Step 2: Convert to fraction form
   2,111.56/3,162.30 = 1,801.72/x
3. Step 3: Cross multiply
   2,111.56x = 3,162.30 × 1,801.72
4. Step 4: Simplify right side
   2,111.56x = 5,697,579.16
5. Step 5: Solve for x
   x = 5,697,579.16/2,111.56
6. Step 6: Final answer
   x = 2,698.28