Finding the Third Proportional to 42,639.75 and 63,964.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,639.75 : 63,964.69 = 63,964.69 : x
2. Step 2: Convert to fraction form
   42,639.75/63,964.69 = 63,964.69/x
3. Step 3: Cross multiply
   42,639.75x = 63,964.69 × 63,964.69
4. Step 4: Simplify right side
   42,639.75x = 4,091,481,246.97
5. Step 5: Solve for x
   x = 4,091,481,246.97/42,639.75
6. Step 6: Final answer
   x = 95,954.63