Finding the Third Proportional to 866,555 and 1,870,121

Step by Step Solution

1. Step 1: Write the proportion equation
   866,555 : 1,870,121 = 1,870,121 : x
2. Step 2: Convert to fraction form
   866,555/1,870,121 = 1,870,121/x
3. Step 3: Cross multiply
   866,555x = 1,870,121 × 1,870,121
4. Step 4: Simplify right side
   866,555x = 3,497,352,554,641
5. Step 5: Solve for x
   x = 3,497,352,554,641/866,555
6. Step 6: Final answer
   x = 4,035,926.81