Finding the Fourth Proportional to 2,111.73, 2,910.72 and 1,691.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.73 : 2,910.72 = 1,691.34 : x
2. Step 2: Convert to fraction form
   2,111.73/2,910.72 = 1,691.34/x
3. Step 3: Cross multiply
   2,111.73x = 2,910.72 × 1,691.34
4. Step 4: Simplify right side
   2,111.73x = 4,923,017.16
5. Step 5: Solve for x
   x = 4,923,017.16/2,111.73
6. Step 6: Final answer
   x = 2,331.27