Finding the Third Proportional to 34,086.45 and 69,864.40

Step by Step Solution

1. Step 1: Write the proportion equation
   34,086.45 : 69,864.40 = 69,864.40 : x
2. Step 2: Convert to fraction form
   34,086.45/69,864.40 = 69,864.40/x
3. Step 3: Cross multiply
   34,086.45x = 69,864.40 × 69,864.40
4. Step 4: Simplify right side
   34,086.45x = 4,881,034,169.03
5. Step 5: Solve for x
   x = 4,881,034,169.03/34,086.45
6. Step 6: Final answer
   x = 143,195.75