Finding the Third Proportional to 21,238.50 and 31,209

Step by Step Solution

1. Step 1: Write the proportion equation
   21,238.50 : 31,209 = 31,209 : x
2. Step 2: Convert to fraction form
   21,238.50/31,209 = 31,209/x
3. Step 3: Cross multiply
   21,238.50x = 31,209 × 31,209
4. Step 4: Simplify right side
   21,238.50x = 974,001,681
5. Step 5: Solve for x
   x = 974,001,681/21,238.50
6. Step 6: Final answer
   x = 45,860.19