Finding the Third Proportional to 30,298.50 and 64,485

Step by Step Solution

1. Step 1: Write the proportion equation
   30,298.50 : 64,485 = 64,485 : x
2. Step 2: Convert to fraction form
   30,298.50/64,485 = 64,485/x
3. Step 3: Cross multiply
   30,298.50x = 64,485 × 64,485
4. Step 4: Simplify right side
   30,298.50x = 4,158,315,225
5. Step 5: Solve for x
   x = 4,158,315,225/30,298.50
6. Step 6: Final answer
   x = 137,244.92