Finding the Third Proportional to 66,518 and 142,260

Step by Step Solution

1. Step 1: Write the proportion equation
   66,518 : 142,260 = 142,260 : x
2. Step 2: Convert to fraction form
   66,518/142,260 = 142,260/x
3. Step 3: Cross multiply
   66,518x = 142,260 × 142,260
4. Step 4: Simplify right side
   66,518x = 20,237,907,600
5. Step 5: Solve for x
   x = 20,237,907,600/66,518
6. Step 6: Final answer
   x = 304,247.08