Finding the Third Proportional to 866,862 and 1,867,131

Step by Step Solution

1. Step 1: Write the proportion equation
   866,862 : 1,867,131 = 1,867,131 : x
2. Step 2: Convert to fraction form
   866,862/1,867,131 = 1,867,131/x
3. Step 3: Cross multiply
   866,862x = 1,867,131 × 1,867,131
4. Step 4: Simplify right side
   866,862x = 3,486,178,171,161
5. Step 5: Solve for x
   x = 3,486,178,171,161/866,862
6. Step 6: Final answer
   x = 4,021,606.87