Finding the Fourth Proportional to 2,118.72, 3,178.08 and 1,092

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.72 : 3,178.08 = 1,092 : x
2. Step 2: Convert to fraction form
   2,118.72/3,178.08 = 1,092/x
3. Step 3: Cross multiply
   2,118.72x = 3,178.08 × 1,092
4. Step 4: Simplify right side
   2,118.72x = 3,470,463.36
5. Step 5: Solve for x
   x = 3,470,463.36/2,118.72
6. Step 6: Final answer
   x = 1,638