Finding the Third Proportional to 87,858 and 207,300

Step by Step Solution

1. Step 1: Write the proportion equation
   87,858 : 207,300 = 207,300 : x
2. Step 2: Convert to fraction form
   87,858/207,300 = 207,300/x
3. Step 3: Cross multiply
   87,858x = 207,300 × 207,300
4. Step 4: Simplify right side
   87,858x = 42,973,290,000
5. Step 5: Solve for x
   x = 42,973,290,000/87,858
6. Step 6: Final answer
   x = 489,122.11