Finding the Third Proportional to 13,142 and 28,390

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142 : 28,390 = 28,390 : x
2. Step 2: Convert to fraction form
   13,142/28,390 = 28,390/x
3. Step 3: Cross multiply
   13,142x = 28,390 × 28,390
4. Step 4: Simplify right side
   13,142x = 805,992,100
5. Step 5: Solve for x
   x = 805,992,100/13,142
6. Step 6: Final answer
   x = 61,329.49