Finding the Third Proportional to 77,981.75 and 123,971.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,981.75 : 123,971.50 = 123,971.50 : x
2. Step 2: Convert to fraction form
   77,981.75/123,971.50 = 123,971.50/x
3. Step 3: Cross multiply
   77,981.75x = 123,971.50 × 123,971.50
4. Step 4: Simplify right side
   77,981.75x = 15,368,932,812.25
5. Step 5: Solve for x
   x = 15,368,932,812.25/77,981.75
6. Step 6: Final answer
   x = 197,083.71