Finding the Third Proportional to 21,432 and 30,516

Step by Step Solution

1. Step 1: Write the proportion equation
   21,432 : 30,516 = 30,516 : x
2. Step 2: Convert to fraction form
   21,432/30,516 = 30,516/x
3. Step 3: Cross multiply
   21,432x = 30,516 × 30,516
4. Step 4: Simplify right side
   21,432x = 931,226,256
5. Step 5: Solve for x
   x = 931,226,256/21,432
6. Step 6: Final answer
   x = 43,450.27