Finding the Third Proportional to 50,715.50 and 78,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50,715.50 : 78,837.50 = 78,837.50 : x
2. Step 2: Convert to fraction form
   50,715.50/78,837.50 = 78,837.50/x
3. Step 3: Cross multiply
   50,715.50x = 78,837.50 × 78,837.50
4. Step 4: Simplify right side
   50,715.50x = 6,215,351,406.25
5. Step 5: Solve for x
   x = 6,215,351,406.25/50,715.50
6. Step 6: Final answer
   x = 122,553.29