Finding the Fourth Proportional to 2,764.72, 3,815.01 and 1,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.72 : 3,815.01 = 1,645.50 : x
2. Step 2: Convert to fraction form
   2,764.72/3,815.01 = 1,645.50/x
3. Step 3: Cross multiply
   2,764.72x = 3,815.01 × 1,645.50
4. Step 4: Simplify right side
   2,764.72x = 6,277,598.96
5. Step 5: Solve for x
   x = 6,277,598.96/2,764.72
6. Step 6: Final answer
   x = 2,270.61