Finding the Third Proportional to 28,385 and 42,970

Step by Step Solution

1. Step 1: Write the proportion equation
   28,385 : 42,970 = 42,970 : x
2. Step 2: Convert to fraction form
   28,385/42,970 = 42,970/x
3. Step 3: Cross multiply
   28,385x = 42,970 × 42,970
4. Step 4: Simplify right side
   28,385x = 1,846,420,900
5. Step 5: Solve for x
   x = 1,846,420,900/28,385
6. Step 6: Final answer
   x = 65,049.18