Finding the Third Proportional to 77,719.50 and 170,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,719.50 : 170,059.50 = 170,059.50 : x
2. Step 2: Convert to fraction form
   77,719.50/170,059.50 = 170,059.50/x
3. Step 3: Cross multiply
   77,719.50x = 170,059.50 × 170,059.50
4. Step 4: Simplify right side
   77,719.50x = 28,920,233,540.25
5. Step 5: Solve for x
   x = 28,920,233,540.25/77,719.50
6. Step 6: Final answer
   x = 372,110.39