Finding the Third Proportional to 8,112 and 12,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112 : 12,316.50 = 12,316.50 : x
2. Step 2: Convert to fraction form
   8,112/12,316.50 = 12,316.50/x
3. Step 3: Cross multiply
   8,112x = 12,316.50 × 12,316.50
4. Step 4: Simplify right side
   8,112x = 151,696,172.25
5. Step 5: Solve for x
   x = 151,696,172.25/8,112
6. Step 6: Final answer
   x = 18,700.22