Finding the Third Proportional to 56,377.50 and 82,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,377.50 : 82,720.50 = 82,720.50 : x
2. Step 2: Convert to fraction form
   56,377.50/82,720.50 = 82,720.50/x
3. Step 3: Cross multiply
   56,377.50x = 82,720.50 × 82,720.50
4. Step 4: Simplify right side
   56,377.50x = 6,842,681,120.25
5. Step 5: Solve for x
   x = 6,842,681,120.25/56,377.50
6. Step 6: Final answer
   x = 121,372.55