Finding the Third Proportional to 28,722 and 42,910

Step by Step Solution

1. Step 1: Write the proportion equation
   28,722 : 42,910 = 42,910 : x
2. Step 2: Convert to fraction form
   28,722/42,910 = 42,910/x
3. Step 3: Cross multiply
   28,722x = 42,910 × 42,910
4. Step 4: Simplify right side
   28,722x = 1,841,268,100
5. Step 5: Solve for x
   x = 1,841,268,100/28,722
6. Step 6: Final answer
   x = 64,106.54