Finding the Third Proportional to 77,980.50 and 123,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,980.50 : 123,969.50 = 123,969.50 : x
2. Step 2: Convert to fraction form
   77,980.50/123,969.50 = 123,969.50/x
3. Step 3: Cross multiply
   77,980.50x = 123,969.50 × 123,969.50
4. Step 4: Simplify right side
   77,980.50x = 15,368,436,930.25
5. Step 5: Solve for x
   x = 15,368,436,930.25/77,980.50
6. Step 6: Final answer
   x = 197,080.51