Finding the Third Proportional to 12,175.31 and 21,115.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,175.31 : 21,115.69 = 21,115.69 : x
2. Step 2: Convert to fraction form
   12,175.31/21,115.69 = 21,115.69/x
3. Step 3: Cross multiply
   12,175.31x = 21,115.69 × 21,115.69
4. Step 4: Simplify right side
   12,175.31x = 445,872,258.60
5. Step 5: Solve for x
   x = 445,872,258.60/12,175.31
6. Step 6: Final answer
   x = 36,621.01