Finding the Third Proportional to 28,240 and 42,223

Step by Step Solution

1. Step 1: Write the proportion equation
   28,240 : 42,223 = 42,223 : x
2. Step 2: Convert to fraction form
   28,240/42,223 = 42,223/x
3. Step 3: Cross multiply
   28,240x = 42,223 × 42,223
4. Step 4: Simplify right side
   28,240x = 1,782,781,729
5. Step 5: Solve for x
   x = 1,782,781,729/28,240
6. Step 6: Final answer
   x = 63,129.66