Finding the Third Proportional to 104,002.50 and 212,919

Step by Step Solution

1. Step 1: Write the proportion equation
   104,002.50 : 212,919 = 212,919 : x
2. Step 2: Convert to fraction form
   104,002.50/212,919 = 212,919/x
3. Step 3: Cross multiply
   104,002.50x = 212,919 × 212,919
4. Step 4: Simplify right side
   104,002.50x = 45,334,500,561
5. Step 5: Solve for x
   x = 45,334,500,561/104,002.50
6. Step 6: Final answer
   x = 435,898.18