Finding the Fourth Proportional to 2,118.57, 2,920.76 and 1,786.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.57 : 2,920.76 = 1,786.42 : x
2. Step 2: Convert to fraction form
   2,118.57/2,920.76 = 1,786.42/x
3. Step 3: Cross multiply
   2,118.57x = 2,920.76 × 1,786.42
4. Step 4: Simplify right side
   2,118.57x = 5,217,705.50
5. Step 5: Solve for x
   x = 5,217,705.50/2,118.57
6. Step 6: Final answer
   x = 2,462.84