Finding the Third Proportional to 851,786 and 1,876,405

Step by Step Solution

1. Step 1: Write the proportion equation
   851,786 : 1,876,405 = 1,876,405 : x
2. Step 2: Convert to fraction form
   851,786/1,876,405 = 1,876,405/x
3. Step 3: Cross multiply
   851,786x = 1,876,405 × 1,876,405
4. Step 4: Simplify right side
   851,786x = 3,520,895,724,025
5. Step 5: Solve for x
   x = 3,520,895,724,025/851,786
6. Step 6: Final answer
   x = 4,133,544.96