Finding the Third Proportional to 19,759 and 42,290

Step by Step Solution

1. Step 1: Write the proportion equation
   19,759 : 42,290 = 42,290 : x
2. Step 2: Convert to fraction form
   19,759/42,290 = 42,290/x
3. Step 3: Cross multiply
   19,759x = 42,290 × 42,290
4. Step 4: Simplify right side
   19,759x = 1,788,444,100
5. Step 5: Solve for x
   x = 1,788,444,100/19,759
6. Step 6: Final answer
   x = 90,512.89