Finding the Third Proportional to 67,990 and 145,826

Step by Step Solution

1. Step 1: Write the proportion equation
   67,990 : 145,826 = 145,826 : x
2. Step 2: Convert to fraction form
   67,990/145,826 = 145,826/x
3. Step 3: Cross multiply
   67,990x = 145,826 × 145,826
4. Step 4: Simplify right side
   67,990x = 21,265,222,276
5. Step 5: Solve for x
   x = 21,265,222,276/67,990
6. Step 6: Final answer
   x = 312,769.85