Finding the Third Proportional to 9,866.81 and 21,810.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,866.81 : 21,810.94 = 21,810.94 : x
2. Step 2: Convert to fraction form
   9,866.81/21,810.94 = 21,810.94/x
3. Step 3: Cross multiply
   9,866.81x = 21,810.94 × 21,810.94
4. Step 4: Simplify right side
   9,866.81x = 475,716,994.63
5. Step 5: Solve for x
   x = 475,716,994.63/9,866.81
6. Step 6: Final answer
   x = 48,213.85