Finding the Third Proportional to 398,318 and 852,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,318 : 852,543.50 = 852,543.50 : x
2. Step 2: Convert to fraction form
   398,318/852,543.50 = 852,543.50/x
3. Step 3: Cross multiply
   398,318x = 852,543.50 × 852,543.50
4. Step 4: Simplify right side
   398,318x = 726,830,419,392.25
5. Step 5: Solve for x
   x = 726,830,419,392.25/398,318
6. Step 6: Final answer
   x = 1,824,749.12