Finding the Third Proportional to 77,715.50 and 116,860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,715.50 : 116,860.50 = 116,860.50 : x
2. Step 2: Convert to fraction form
   77,715.50/116,860.50 = 116,860.50/x
3. Step 3: Cross multiply
   77,715.50x = 116,860.50 × 116,860.50
4. Step 4: Simplify right side
   77,715.50x = 13,656,376,460.25
5. Step 5: Solve for x
   x = 13,656,376,460.25/77,715.50
6. Step 6: Final answer
   x = 175,722.69