Finding the Third Proportional to 2,576.81 and 3,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.81 : 3,685.50 = 3,685.50 : x
2. Step 2: Convert to fraction form
   2,576.81/3,685.50 = 3,685.50/x
3. Step 3: Cross multiply
   2,576.81x = 3,685.50 × 3,685.50
4. Step 4: Simplify right side
   2,576.81x = 13,582,910.25
5. Step 5: Solve for x
   x = 13,582,910.25/2,576.81
6. Step 6: Final answer
   x = 5,271.21