Finding the Third Proportional to 2,572.31 and 5,620.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.31 : 5,620.22 = 5,620.22 : x
2. Step 2: Convert to fraction form
   2,572.31/5,620.22 = 5,620.22/x
3. Step 3: Cross multiply
   2,572.31x = 5,620.22 × 5,620.22
4. Step 4: Simplify right side
   2,572.31x = 31,586,858.80
5. Step 5: Solve for x
   x = 31,586,858.80/2,572.31
6. Step 6: Final answer
   x = 12,279.56