Finding the Third Proportional to 409,139 and 875,140

Step by Step Solution

1. Step 1: Write the proportion equation
   409,139 : 875,140 = 875,140 : x
2. Step 2: Convert to fraction form
   409,139/875,140 = 875,140/x
3. Step 3: Cross multiply
   409,139x = 875,140 × 875,140
4. Step 4: Simplify right side
   409,139x = 765,870,019,600
5. Step 5: Solve for x
   x = 765,870,019,600/409,139
6. Step 6: Final answer
   x = 1,871,906.66