Finding the Third Proportional to 10,422 and 13,972.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,422 : 13,972.50 = 13,972.50 : x
2. Step 2: Convert to fraction form
   10,422/13,972.50 = 13,972.50/x
3. Step 3: Cross multiply
   10,422x = 13,972.50 × 13,972.50
4. Step 4: Simplify right side
   10,422x = 195,230,756.25
5. Step 5: Solve for x
   x = 195,230,756.25/10,422
6. Step 6: Final answer
   x = 18,732.56