Finding the Third Proportional to 9,880.31 and 21,152.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.31 : 21,152.81 = 21,152.81 : x
2. Step 2: Convert to fraction form
   9,880.31/21,152.81 = 21,152.81/x
3. Step 3: Cross multiply
   9,880.31x = 21,152.81 × 21,152.81
4. Step 4: Simplify right side
   9,880.31x = 447,441,476.66
5. Step 5: Solve for x
   x = 447,441,476.66/9,880.31
6. Step 6: Final answer
   x = 45,286.17