Finding the Third Proportional to 51,720.50 and 79,083.75

Step by Step Solution

1. Step 1: Write the proportion equation
   51,720.50 : 79,083.75 = 79,083.75 : x
2. Step 2: Convert to fraction form
   51,720.50/79,083.75 = 79,083.75/x
3. Step 3: Cross multiply
   51,720.50x = 79,083.75 × 79,083.75
4. Step 4: Simplify right side
   51,720.50x = 6,254,239,514.06
5. Step 5: Solve for x
   x = 6,254,239,514.06/51,720.50
6. Step 6: Final answer
   x = 120,923.80