Finding the Third Proportional to 27,620 and 42,479

Step by Step Solution

1. Step 1: Write the proportion equation
   27,620 : 42,479 = 42,479 : x
2. Step 2: Convert to fraction form
   27,620/42,479 = 42,479/x
3. Step 3: Cross multiply
   27,620x = 42,479 × 42,479
4. Step 4: Simplify right side
   27,620x = 1,804,465,441
5. Step 5: Solve for x
   x = 1,804,465,441/27,620
6. Step 6: Final answer
   x = 65,331.84