Finding the Third Proportional to 68,799.50 and 91,742.75

Step by Step Solution

1. Step 1: Write the proportion equation
   68,799.50 : 91,742.75 = 91,742.75 : x
2. Step 2: Convert to fraction form
   68,799.50/91,742.75 = 91,742.75/x
3. Step 3: Cross multiply
   68,799.50x = 91,742.75 × 91,742.75
4. Step 4: Simplify right side
   68,799.50x = 8,416,732,177.56
5. Step 5: Solve for x
   x = 8,416,732,177.56/68,799.50
6. Step 6: Final answer
   x = 122,337.11