Finding the Third Proportional to 78,808.50 and 108,427.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,808.50 : 108,427.50 = 108,427.50 : x
2. Step 2: Convert to fraction form
   78,808.50/108,427.50 = 108,427.50/x
3. Step 3: Cross multiply
   78,808.50x = 108,427.50 × 108,427.50
4. Step 4: Simplify right side
   78,808.50x = 11,756,522,756.25
5. Step 5: Solve for x
   x = 11,756,522,756.25/78,808.50
6. Step 6: Final answer
   x = 149,178.36