Finding the Third Proportional to 40,990 and 55,634

Step by Step Solution

1. Step 1: Write the proportion equation
   40,990 : 55,634 = 55,634 : x
2. Step 2: Convert to fraction form
   40,990/55,634 = 55,634/x
3. Step 3: Cross multiply
   40,990x = 55,634 × 55,634
4. Step 4: Simplify right side
   40,990x = 3,095,141,956
5. Step 5: Solve for x
   x = 3,095,141,956/40,990
6. Step 6: Final answer
   x = 75,509.68