Finding the Third Proportional to 3,430.69 and 8,009.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,430.69 : 8,009.72 = 8,009.72 : x
2. Step 2: Convert to fraction form
   3,430.69/8,009.72 = 8,009.72/x
3. Step 3: Cross multiply
   3,430.69x = 8,009.72 × 8,009.72
4. Step 4: Simplify right side
   3,430.69x = 64,155,594.45
5. Step 5: Solve for x
   x = 64,155,594.45/3,430.69
6. Step 6: Final answer
   x = 18,700.51