Finding the Third Proportional to 9,091.50 and 19,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091.50 : 19,870.50 = 19,870.50 : x
2. Step 2: Convert to fraction form
   9,091.50/19,870.50 = 19,870.50/x
3. Step 3: Cross multiply
   9,091.50x = 19,870.50 × 19,870.50
4. Step 4: Simplify right side
   9,091.50x = 394,836,770.25
5. Step 5: Solve for x
   x = 394,836,770.25/9,091.50
6. Step 6: Final answer
   x = 43,429.22