Finding the Third Proportional to 30,210 and 42,808.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,210 : 42,808.50 = 42,808.50 : x
2. Step 2: Convert to fraction form
   30,210/42,808.50 = 42,808.50/x
3. Step 3: Cross multiply
   30,210x = 42,808.50 × 42,808.50
4. Step 4: Simplify right side
   30,210x = 1,832,567,672.25
5. Step 5: Solve for x
   x = 1,832,567,672.25/30,210
6. Step 6: Final answer
   x = 60,660.96