Finding the Third Proportional to 432,313.50 and 690,630

Step by Step Solution

1. Step 1: Write the proportion equation
   432,313.50 : 690,630 = 690,630 : x
2. Step 2: Convert to fraction form
   432,313.50/690,630 = 690,630/x
3. Step 3: Cross multiply
   432,313.50x = 690,630 × 690,630
4. Step 4: Simplify right side
   432,313.50x = 476,969,796,900
5. Step 5: Solve for x
   x = 476,969,796,900/432,313.50
6. Step 6: Final answer
   x = 1,103,296.10