Finding the Third Proportional to 28,372 and 42,280

Step by Step Solution

1. Step 1: Write the proportion equation
   28,372 : 42,280 = 42,280 : x
2. Step 2: Convert to fraction form
   28,372/42,280 = 42,280/x
3. Step 3: Cross multiply
   28,372x = 42,280 × 42,280
4. Step 4: Simplify right side
   28,372x = 1,787,598,400
5. Step 5: Solve for x
   x = 1,787,598,400/28,372
6. Step 6: Final answer
   x = 63,005.72