Finding the Third Proportional to 7,128.56 and 15,568.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.56 : 15,568.31 = 15,568.31 : x
2. Step 2: Convert to fraction form
   7,128.56/15,568.31 = 15,568.31/x
3. Step 3: Cross multiply
   7,128.56x = 15,568.31 × 15,568.31
4. Step 4: Simplify right side
   7,128.56x = 242,372,354.10
5. Step 5: Solve for x
   x = 242,372,354.10/7,128.56
6. Step 6: Final answer
   x = 34,000.17