Finding the Third Proportional to 19,504 and 42,121

Step by Step Solution

1. Step 1: Write the proportion equation
   19,504 : 42,121 = 42,121 : x
2. Step 2: Convert to fraction form
   19,504/42,121 = 42,121/x
3. Step 3: Cross multiply
   19,504x = 42,121 × 42,121
4. Step 4: Simplify right side
   19,504x = 1,774,178,641
5. Step 5: Solve for x
   x = 1,774,178,641/19,504
6. Step 6: Final answer
   x = 90,964.86