Finding the Third Proportional to 407,970 and 872,074

Step by Step Solution

1. Step 1: Write the proportion equation
   407,970 : 872,074 = 872,074 : x
2. Step 2: Convert to fraction form
   407,970/872,074 = 872,074/x
3. Step 3: Cross multiply
   407,970x = 872,074 × 872,074
4. Step 4: Simplify right side
   407,970x = 760,513,061,476
5. Step 5: Solve for x
   x = 760,513,061,476/407,970
6. Step 6: Final answer
   x = 1,864,139.67