Finding the Third Proportional to 396,870.47 and 870,820.03

Step by Step Solution

1. Step 1: Write the proportion equation
   396,870.47 : 870,820.03 = 870,820.03 : x
2. Step 2: Convert to fraction form
   396,870.47/870,820.03 = 870,820.03/x
3. Step 3: Cross multiply
   396,870.47x = 870,820.03 × 870,820.03
4. Step 4: Simplify right side
   396,870.47x = 758,327,526,826.25
5. Step 5: Solve for x
   x = 758,327,526,826.25/396,870.47
6. Step 6: Final answer
   x = 1,910,768.34