Finding the Third Proportional to 28,388 and 42,603

Step by Step Solution

1. Step 1: Write the proportion equation
   28,388 : 42,603 = 42,603 : x
2. Step 2: Convert to fraction form
   28,388/42,603 = 42,603/x
3. Step 3: Cross multiply
   28,388x = 42,603 × 42,603
4. Step 4: Simplify right side
   28,388x = 1,815,015,609
5. Step 5: Solve for x
   x = 1,815,015,609/28,388
6. Step 6: Final answer
   x = 63,936.02