Finding the Fourth Proportional to 2,810.72, 3,878.42 and 1,691.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.72 : 3,878.42 = 1,691.93 : x
2. Step 2: Convert to fraction form
   2,810.72/3,878.42 = 1,691.93/x
3. Step 3: Cross multiply
   2,810.72x = 3,878.42 × 1,691.93
4. Step 4: Simplify right side
   2,810.72x = 6,562,016.39
5. Step 5: Solve for x
   x = 6,562,016.39/2,810.72
6. Step 6: Final answer
   x = 2,334.64