Finding the Third Proportional to 19,989 and 43,290

Step by Step Solution

1. Step 1: Write the proportion equation
   19,989 : 43,290 = 43,290 : x
2. Step 2: Convert to fraction form
   19,989/43,290 = 43,290/x
3. Step 3: Cross multiply
   19,989x = 43,290 × 43,290
4. Step 4: Simplify right side
   19,989x = 1,874,024,100
5. Step 5: Solve for x
   x = 1,874,024,100/19,989
6. Step 6: Final answer
   x = 93,752.77