Finding the Third Proportional to 30,400 and 45,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,400 : 45,478.50 = 45,478.50 : x
2. Step 2: Convert to fraction form
   30,400/45,478.50 = 45,478.50/x
3. Step 3: Cross multiply
   30,400x = 45,478.50 × 45,478.50
4. Step 4: Simplify right side
   30,400x = 2,068,293,962.25
5. Step 5: Solve for x
   x = 2,068,293,962.25/30,400
6. Step 6: Final answer
   x = 68,035.99