Finding the Third Proportional to 43,210.50 and 65,689.25

Step by Step Solution

1. Step 1: Write the proportion equation
   43,210.50 : 65,689.25 = 65,689.25 : x
2. Step 2: Convert to fraction form
   43,210.50/65,689.25 = 65,689.25/x
3. Step 3: Cross multiply
   43,210.50x = 65,689.25 × 65,689.25
4. Step 4: Simplify right side
   43,210.50x = 4,315,077,565.56
5. Step 5: Solve for x
   x = 4,315,077,565.56/43,210.50
6. Step 6: Final answer
   x = 99,861.78