Finding the Third Proportional to 30,904.50 and 67,821

Step by Step Solution

1. Step 1: Write the proportion equation
   30,904.50 : 67,821 = 67,821 : x
2. Step 2: Convert to fraction form
   30,904.50/67,821 = 67,821/x
3. Step 3: Cross multiply
   30,904.50x = 67,821 × 67,821
4. Step 4: Simplify right side
   30,904.50x = 4,599,688,041
5. Step 5: Solve for x
   x = 4,599,688,041/30,904.50
6. Step 6: Final answer
   x = 148,835.54