Finding the Third Proportional to 9,947.81 and 21,652.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.81 : 21,652.31 = 21,652.31 : x
2. Step 2: Convert to fraction form
   9,947.81/21,652.31 = 21,652.31/x
3. Step 3: Cross multiply
   9,947.81x = 21,652.31 × 21,652.31
4. Step 4: Simplify right side
   9,947.81x = 468,822,636.60
5. Step 5: Solve for x
   x = 468,822,636.60/9,947.81
6. Step 6: Final answer
   x = 47,128.21