Finding the Fourth Proportional to 2,665.34, 3,991.82 and 2,573.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.34 : 3,991.82 = 2,573.06 : x
2. Step 2: Convert to fraction form
   2,665.34/3,991.82 = 2,573.06/x
3. Step 3: Cross multiply
   2,665.34x = 3,991.82 × 2,573.06
4. Step 4: Simplify right side
   2,665.34x = 10,271,192.37
5. Step 5: Solve for x
   x = 10,271,192.37/2,665.34
6. Step 6: Final answer
   x = 3,853.61