Finding the Third Proportional to 21,388 and 31,432

Step by Step Solution

1. Step 1: Write the proportion equation
   21,388 : 31,432 = 31,432 : x
2. Step 2: Convert to fraction form
   21,388/31,432 = 31,432/x
3. Step 3: Cross multiply
   21,388x = 31,432 × 31,432
4. Step 4: Simplify right side
   21,388x = 987,970,624
5. Step 5: Solve for x
   x = 987,970,624/21,388
6. Step 6: Final answer
   x = 46,192.75