Finding the Third Proportional to 315,454.50 and 684,153

Step by Step Solution

1. Step 1: Write the proportion equation
   315,454.50 : 684,153 = 684,153 : x
2. Step 2: Convert to fraction form
   315,454.50/684,153 = 684,153/x
3. Step 3: Cross multiply
   315,454.50x = 684,153 × 684,153
4. Step 4: Simplify right side
   315,454.50x = 468,065,327,409
5. Step 5: Solve for x
   x = 468,065,327,409/315,454.50
6. Step 6: Final answer
   x = 1,483,780.79