Finding the Third Proportional to 398,623.50 and 537,030

Step by Step Solution

1. Step 1: Write the proportion equation
   398,623.50 : 537,030 = 537,030 : x
2. Step 2: Convert to fraction form
   398,623.50/537,030 = 537,030/x
3. Step 3: Cross multiply
   398,623.50x = 537,030 × 537,030
4. Step 4: Simplify right side
   398,623.50x = 288,401,220,900
5. Step 5: Solve for x
   x = 288,401,220,900/398,623.50
6. Step 6: Final answer
   x = 723,492.77