Finding the Third Proportional to 28,422 and 42,457

Step by Step Solution

1. Step 1: Write the proportion equation
   28,422 : 42,457 = 42,457 : x
2. Step 2: Convert to fraction form
   28,422/42,457 = 42,457/x
3. Step 3: Cross multiply
   28,422x = 42,457 × 42,457
4. Step 4: Simplify right side
   28,422x = 1,802,596,849
5. Step 5: Solve for x
   x = 1,802,596,849/28,422
6. Step 6: Final answer
   x = 63,422.59