Finding the Third Proportional to 85,361.50 and 129,216

Step by Step Solution

1. Step 1: Write the proportion equation
   85,361.50 : 129,216 = 129,216 : x
2. Step 2: Convert to fraction form
   85,361.50/129,216 = 129,216/x
3. Step 3: Cross multiply
   85,361.50x = 129,216 × 129,216
4. Step 4: Simplify right side
   85,361.50x = 16,696,774,656
5. Step 5: Solve for x
   x = 16,696,774,656/85,361.50
6. Step 6: Final answer
   x = 195,600.76