Finding the Third Proportional to 59,206 and 90,570

Step by Step Solution

1. Step 1: Write the proportion equation
   59,206 : 90,570 = 90,570 : x
2. Step 2: Convert to fraction form
   59,206/90,570 = 90,570/x
3. Step 3: Cross multiply
   59,206x = 90,570 × 90,570
4. Step 4: Simplify right side
   59,206x = 8,202,924,900
5. Step 5: Solve for x
   x = 8,202,924,900/59,206
6. Step 6: Final answer
   x = 138,548.88