Finding the Third Proportional to 396,090 and 848,272.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,090 : 848,272.50 = 848,272.50 : x
2. Step 2: Convert to fraction form
   396,090/848,272.50 = 848,272.50/x
3. Step 3: Cross multiply
   396,090x = 848,272.50 × 848,272.50
4. Step 4: Simplify right side
   396,090x = 719,566,234,256.25
5. Step 5: Solve for x
   x = 719,566,234,256.25/396,090
6. Step 6: Final answer
   x = 1,816,673.57