Finding the Fourth Proportional to 2,665.90, 3,678.78 and 2,036.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.90 : 3,678.78 = 2,036.73 : x
2. Step 2: Convert to fraction form
   2,665.90/3,678.78 = 2,036.73/x
3. Step 3: Cross multiply
   2,665.90x = 3,678.78 × 2,036.73
4. Step 4: Simplify right side
   2,665.90x = 7,492,681.59
5. Step 5: Solve for x
   x = 7,492,681.59/2,665.90
6. Step 6: Final answer
   x = 2,810.56