Finding the Third Proportional to 28,320 and 42,288

Step by Step Solution

1. Step 1: Write the proportion equation
   28,320 : 42,288 = 42,288 : x
2. Step 2: Convert to fraction form
   28,320/42,288 = 42,288/x
3. Step 3: Cross multiply
   28,320x = 42,288 × 42,288
4. Step 4: Simplify right side
   28,320x = 1,788,274,944
5. Step 5: Solve for x
   x = 1,788,274,944/28,320
6. Step 6: Final answer
   x = 63,145.30