Finding the Fourth Proportional to 2,178.58, 3,009.82 and 2,162.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.58 : 3,009.82 = 2,162.18 : x
2. Step 2: Convert to fraction form
   2,178.58/3,009.82 = 2,162.18/x
3. Step 3: Cross multiply
   2,178.58x = 3,009.82 × 2,162.18
4. Step 4: Simplify right side
   2,178.58x = 6,507,772.61
5. Step 5: Solve for x
   x = 6,507,772.61/2,178.58
6. Step 6: Final answer
   x = 2,987.16