Finding the Fourth Proportional to 3,784.70, 5,223.89 and 2,665.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.70 : 5,223.89 = 2,665.97 : x
2. Step 2: Convert to fraction form
   3,784.70/5,223.89 = 2,665.97/x
3. Step 3: Cross multiply
   3,784.70x = 5,223.89 × 2,665.97
4. Step 4: Simplify right side
   3,784.70x = 13,926,734.02
5. Step 5: Solve for x
   x = 13,926,734.02/3,784.70
6. Step 6: Final answer
   x = 3,679.75