Finding the Third Proportional to 42,979 and 66,414

Step by Step Solution

1. Step 1: Write the proportion equation
   42,979 : 66,414 = 66,414 : x
2. Step 2: Convert to fraction form
   42,979/66,414 = 66,414/x
3. Step 3: Cross multiply
   42,979x = 66,414 × 66,414
4. Step 4: Simplify right side
   42,979x = 4,410,819,396
5. Step 5: Solve for x
   x = 4,410,819,396/42,979
6. Step 6: Final answer
   x = 102,627.32