Finding the Third Proportional to 19,870 and 28,979

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870 : 28,979 = 28,979 : x
2. Step 2: Convert to fraction form
   19,870/28,979 = 28,979/x
3. Step 3: Cross multiply
   19,870x = 28,979 × 28,979
4. Step 4: Simplify right side
   19,870x = 839,782,441
5. Step 5: Solve for x
   x = 839,782,441/19,870
6. Step 6: Final answer
   x = 42,263.84