Finding the Third Proportional to 42,572 and 64,449

Step by Step Solution

1. Step 1: Write the proportion equation
   42,572 : 64,449 = 64,449 : x
2. Step 2: Convert to fraction form
   42,572/64,449 = 64,449/x
3. Step 3: Cross multiply
   42,572x = 64,449 × 64,449
4. Step 4: Simplify right side
   42,572x = 4,153,673,601
5. Step 5: Solve for x
   x = 4,153,673,601/42,572
6. Step 6: Final answer
   x = 97,568.20