Finding the Third Proportional to 398,686.50 and 852,696

Step by Step Solution

1. Step 1: Write the proportion equation
   398,686.50 : 852,696 = 852,696 : x
2. Step 2: Convert to fraction form
   398,686.50/852,696 = 852,696/x
3. Step 3: Cross multiply
   398,686.50x = 852,696 × 852,696
4. Step 4: Simplify right side
   398,686.50x = 727,090,468,416
5. Step 5: Solve for x
   x = 727,090,468,416/398,686.50
6. Step 6: Final answer
   x = 1,823,714.79