Finding the Fourth Proportional to 2,051.23, 3,076.86 and 664.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.23 : 3,076.86 = 664.55 : x
2. Step 2: Convert to fraction form
   2,051.23/3,076.86 = 664.55/x
3. Step 3: Cross multiply
   2,051.23x = 3,076.86 × 664.55
4. Step 4: Simplify right side
   2,051.23x = 2,044,727.31
5. Step 5: Solve for x
   x = 2,044,727.31/2,051.23
6. Step 6: Final answer
   x = 996.83