Finding the Third Proportional to 30,679 and 64,894.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,679 : 64,894.50 = 64,894.50 : x
2. Step 2: Convert to fraction form
   30,679/64,894.50 = 64,894.50/x
3. Step 3: Cross multiply
   30,679x = 64,894.50 × 64,894.50
4. Step 4: Simplify right side
   30,679x = 4,211,296,130.25
5. Step 5: Solve for x
   x = 4,211,296,130.25/30,679
6. Step 6: Final answer
   x = 137,269.67