Finding the Third Proportional to 42,340.50 and 64,974.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,340.50 : 64,974.75 = 64,974.75 : x
2. Step 2: Convert to fraction form
   42,340.50/64,974.75 = 64,974.75/x
3. Step 3: Cross multiply
   42,340.50x = 64,974.75 × 64,974.75
4. Step 4: Simplify right side
   42,340.50x = 4,221,718,137.56
5. Step 5: Solve for x
   x = 4,221,718,137.56/42,340.50
6. Step 6: Final answer
   x = 99,708.75