Finding the Third Proportional to 10,503 and 21,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,503 : 21,316.50 = 21,316.50 : x
2. Step 2: Convert to fraction form
   10,503/21,316.50 = 21,316.50/x
3. Step 3: Cross multiply
   10,503x = 21,316.50 × 21,316.50
4. Step 4: Simplify right side
   10,503x = 454,393,172.25
5. Step 5: Solve for x
   x = 454,393,172.25/10,503
6. Step 6: Final answer
   x = 43,263.18