Finding the Fourth Proportional to 2,072.51, 3,109.68 and 1,098.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.51 : 3,109.68 = 1,098.38 : x
2. Step 2: Convert to fraction form
   2,072.51/3,109.68 = 1,098.38/x
3. Step 3: Cross multiply
   2,072.51x = 3,109.68 × 1,098.38
4. Step 4: Simplify right side
   2,072.51x = 3,415,594.77
5. Step 5: Solve for x
   x = 3,415,594.77/2,072.51
6. Step 6: Final answer
   x = 1,648.05