Finding the Third Proportional to 51,810.50 and 64,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,810.50 : 64,279.50 = 64,279.50 : x
2. Step 2: Convert to fraction form
   51,810.50/64,279.50 = 64,279.50/x
3. Step 3: Cross multiply
   51,810.50x = 64,279.50 × 64,279.50
4. Step 4: Simplify right side
   51,810.50x = 4,131,854,120.25
5. Step 5: Solve for x
   x = 4,131,854,120.25/51,810.50
6. Step 6: Final answer
   x = 79,749.36