Finding the Third Proportional to 30,207 and 64,438.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,207 : 64,438.50 = 64,438.50 : x
2. Step 2: Convert to fraction form
   30,207/64,438.50 = 64,438.50/x
3. Step 3: Cross multiply
   30,207x = 64,438.50 × 64,438.50
4. Step 4: Simplify right side
   30,207x = 4,152,320,282.25
5. Step 5: Solve for x
   x = 4,152,320,282.25/30,207
6. Step 6: Final answer
   x = 137,462.19