Finding the Third Proportional to 77,769.75 and 116,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,769.75 : 116,116.50 = 116,116.50 : x
2. Step 2: Convert to fraction form
   77,769.75/116,116.50 = 116,116.50/x
3. Step 3: Cross multiply
   77,769.75x = 116,116.50 × 116,116.50
4. Step 4: Simplify right side
   77,769.75x = 13,483,041,572.25
5. Step 5: Solve for x
   x = 13,483,041,572.25/77,769.75
6. Step 6: Final answer
   x = 173,371.29