Finding the Third Proportional to 64,974 and 142,356.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,974 : 142,356.50 = 142,356.50 : x
2. Step 2: Convert to fraction form
   64,974/142,356.50 = 142,356.50/x
3. Step 3: Cross multiply
   64,974x = 142,356.50 × 142,356.50
4. Step 4: Simplify right side
   64,974x = 20,265,373,092.25
5. Step 5: Solve for x
   x = 20,265,373,092.25/64,974
6. Step 6: Final answer
   x = 311,899.73