Finding the Third Proportional to 21,528 and 34,280

Step by Step Solution

1. Step 1: Write the proportion equation
   21,528 : 34,280 = 34,280 : x
2. Step 2: Convert to fraction form
   21,528/34,280 = 34,280/x
3. Step 3: Cross multiply
   21,528x = 34,280 × 34,280
4. Step 4: Simplify right side
   21,528x = 1,175,118,400
5. Step 5: Solve for x
   x = 1,175,118,400/21,528
6. Step 6: Final answer
   x = 54,585.58