Finding the Third Proportional to 643,315.50 and 943,479

Step by Step Solution

1. Step 1: Write the proportion equation
   643,315.50 : 943,479 = 943,479 : x
2. Step 2: Convert to fraction form
   643,315.50/943,479 = 943,479/x
3. Step 3: Cross multiply
   643,315.50x = 943,479 × 943,479
4. Step 4: Simplify right side
   643,315.50x = 890,152,623,441
5. Step 5: Solve for x
   x = 890,152,623,441/643,315.50
6. Step 6: Final answer
   x = 1,383,695.28