Finding the Third Proportional to 42,273 and 64,999

Step by Step Solution

1. Step 1: Write the proportion equation
   42,273 : 64,999 = 64,999 : x
2. Step 2: Convert to fraction form
   42,273/64,999 = 64,999/x
3. Step 3: Cross multiply
   42,273x = 64,999 × 64,999
4. Step 4: Simplify right side
   42,273x = 4,224,870,001
5. Step 5: Solve for x
   x = 4,224,870,001/42,273
6. Step 6: Final answer
   x = 99,942.52