Finding the Third Proportional to 28,258 and 42,357

Step by Step Solution

1. Step 1: Write the proportion equation
   28,258 : 42,357 = 42,357 : x
2. Step 2: Convert to fraction form
   28,258/42,357 = 42,357/x
3. Step 3: Cross multiply
   28,258x = 42,357 × 42,357
4. Step 4: Simplify right side
   28,258x = 1,794,115,449
5. Step 5: Solve for x
   x = 1,794,115,449/28,258
6. Step 6: Final answer
   x = 63,490.53