Finding the Third Proportional to 62,758.50 and 87,778.50

Step by Step Solution

1. Step 1: Write the proportion equation
   62,758.50 : 87,778.50 = 87,778.50 : x
2. Step 2: Convert to fraction form
   62,758.50/87,778.50 = 87,778.50/x
3. Step 3: Cross multiply
   62,758.50x = 87,778.50 × 87,778.50
4. Step 4: Simplify right side
   62,758.50x = 7,705,065,062.25
5. Step 5: Solve for x
   x = 7,705,065,062.25/62,758.50
6. Step 6: Final answer
   x = 122,773.25