Finding the Third Proportional to 28,173 and 42,172

Step by Step Solution

1. Step 1: Write the proportion equation
   28,173 : 42,172 = 42,172 : x
2. Step 2: Convert to fraction form
   28,173/42,172 = 42,172/x
3. Step 3: Cross multiply
   28,173x = 42,172 × 42,172
4. Step 4: Simplify right side
   28,173x = 1,778,477,584
5. Step 5: Solve for x
   x = 1,778,477,584/28,173
6. Step 6: Final answer
   x = 63,127.02