Finding the Fourth Proportional to 2,072.79, 3,107.16 and 1,097.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.79 : 3,107.16 = 1,097.96 : x
2. Step 2: Convert to fraction form
   2,072.79/3,107.16 = 1,097.96/x
3. Step 3: Cross multiply
   2,072.79x = 3,107.16 × 1,097.96
4. Step 4: Simplify right side
   2,072.79x = 3,411,521.86
5. Step 5: Solve for x
   x = 3,411,521.86/2,072.79
6. Step 6: Final answer
   x = 1,645.86