Finding the Third Proportional to 28,288 and 42,789

Step by Step Solution

1. Step 1: Write the proportion equation
   28,288 : 42,789 = 42,789 : x
2. Step 2: Convert to fraction form
   28,288/42,789 = 42,789/x
3. Step 3: Cross multiply
   28,288x = 42,789 × 42,789
4. Step 4: Simplify right side
   28,288x = 1,830,898,521
5. Step 5: Solve for x
   x = 1,830,898,521/28,288
6. Step 6: Final answer
   x = 64,723.51