Finding the Fourth Proportional to 2,780.53, 4,162.59 and 2,162.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.53 : 4,162.59 = 2,162.09 : x
2. Step 2: Convert to fraction form
   2,780.53/4,162.59 = 2,162.09/x
3. Step 3: Cross multiply
   2,780.53x = 4,162.59 × 2,162.09
4. Step 4: Simplify right side
   2,780.53x = 8,999,904.62
5. Step 5: Solve for x
   x = 8,999,904.62/2,780.53
6. Step 6: Final answer
   x = 3,236.76