Finding the Third Proportional to 21,172 and 45,157

Step by Step Solution

1. Step 1: Write the proportion equation
   21,172 : 45,157 = 45,157 : x
2. Step 2: Convert to fraction form
   21,172/45,157 = 45,157/x
3. Step 3: Cross multiply
   21,172x = 45,157 × 45,157
4. Step 4: Simplify right side
   21,172x = 2,039,154,649
5. Step 5: Solve for x
   x = 2,039,154,649/21,172
6. Step 6: Final answer
   x = 96,313.75