Finding the Third Proportional to 51,818.50 and 64,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,818.50 : 64,287.50 = 64,287.50 : x
2. Step 2: Convert to fraction form
   51,818.50/64,287.50 = 64,287.50/x
3. Step 3: Cross multiply
   51,818.50x = 64,287.50 × 64,287.50
4. Step 4: Simplify right side
   51,818.50x = 4,132,882,656.25
5. Step 5: Solve for x
   x = 4,132,882,656.25/51,818.50
6. Step 6: Final answer
   x = 79,756.89