Finding the Fourth Proportional to 3,886.56, 5,363.46 and 2,118.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.56 : 5,363.46 = 2,118.17 : x
2. Step 2: Convert to fraction form
   3,886.56/5,363.46 = 2,118.17/x
3. Step 3: Cross multiply
   3,886.56x = 5,363.46 × 2,118.17
4. Step 4: Simplify right side
   3,886.56x = 11,360,693.25
5. Step 5: Solve for x
   x = 11,360,693.25/3,886.56
6. Step 6: Final answer
   x = 2,923.07