Finding the Fourth Proportional to 2,111.93, 3,169.80 and 1,072.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.93 : 3,169.80 = 1,072.65 : x
2. Step 2: Convert to fraction form
   2,111.93/3,169.80 = 1,072.65/x
3. Step 3: Cross multiply
   2,111.93x = 3,169.80 × 1,072.65
4. Step 4: Simplify right side
   2,111.93x = 3,400,085.97
5. Step 5: Solve for x
   x = 3,400,085.97/2,111.93
6. Step 6: Final answer
   x = 1,609.94