Finding the Fourth Proportional to 2,118.56, 2,923.62 and 1,187

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.56 : 2,923.62 = 1,187 : x
2. Step 2: Convert to fraction form
   2,118.56/2,923.62 = 1,187/x
3. Step 3: Cross multiply
   2,118.56x = 2,923.62 × 1,187
4. Step 4: Simplify right side
   2,118.56x = 3,470,336.94
5. Step 5: Solve for x
   x = 3,470,336.94/2,118.56
6. Step 6: Final answer
   x = 1,638.06