Finding the Fourth Proportional to 2,118.96, 2,924.15 and 1,187.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.96 : 2,924.15 = 1,187.46 : x
2. Step 2: Convert to fraction form
   2,118.96/2,924.15 = 1,187.46/x
3. Step 3: Cross multiply
   2,118.96x = 2,924.15 × 1,187.46
4. Step 4: Simplify right side
   2,118.96x = 3,472,305.22
5. Step 5: Solve for x
   x = 3,472,305.22/2,118.96
6. Step 6: Final answer
   x = 1,638.68