Finding the Third Proportional to 13,860 and 21,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,860 : 21,316.50 = 21,316.50 : x
2. Step 2: Convert to fraction form
   13,860/21,316.50 = 21,316.50/x
3. Step 3: Cross multiply
   13,860x = 21,316.50 × 21,316.50
4. Step 4: Simplify right side
   13,860x = 454,393,172.25
5. Step 5: Solve for x
   x = 454,393,172.25/13,860
6. Step 6: Final answer
   x = 32,784.50