Finding the Third Proportional to 28,729.50 and 42,921

Step by Step Solution

1. Step 1: Write the proportion equation
   28,729.50 : 42,921 = 42,921 : x
2. Step 2: Convert to fraction form
   28,729.50/42,921 = 42,921/x
3. Step 3: Cross multiply
   28,729.50x = 42,921 × 42,921
4. Step 4: Simplify right side
   28,729.50x = 1,842,212,241
5. Step 5: Solve for x
   x = 1,842,212,241/28,729.50
6. Step 6: Final answer
   x = 64,122.67