Finding the Third Proportional to 9,940.50 and 21,030.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,940.50 : 21,030.50 = 21,030.50 : x
2. Step 2: Convert to fraction form
   9,940.50/21,030.50 = 21,030.50/x
3. Step 3: Cross multiply
   9,940.50x = 21,030.50 × 21,030.50
4. Step 4: Simplify right side
   9,940.50x = 442,281,930.25
5. Step 5: Solve for x
   x = 442,281,930.25/9,940.50
6. Step 6: Final answer
   x = 44,492.93