Finding the Third Proportional to 1,555.50 and 4,031.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.50 : 4,031.25 = 4,031.25 : x
2. Step 2: Convert to fraction form
   1,555.50/4,031.25 = 4,031.25/x
3. Step 3: Cross multiply
   1,555.50x = 4,031.25 × 4,031.25
4. Step 4: Simplify right side
   1,555.50x = 16,250,976.56
5. Step 5: Solve for x
   x = 16,250,976.56/1,555.50
6. Step 6: Final answer
   x = 10,447.43