Finding the Third Proportional to 857,178 and 1,866,740

Step by Step Solution

1. Step 1: Write the proportion equation
   857,178 : 1,866,740 = 1,866,740 : x
2. Step 2: Convert to fraction form
   857,178/1,866,740 = 1,866,740/x
3. Step 3: Cross multiply
   857,178x = 1,866,740 × 1,866,740
4. Step 4: Simplify right side
   857,178x = 3,484,718,227,600
5. Step 5: Solve for x
   x = 3,484,718,227,600/857,178
6. Step 6: Final answer
   x = 4,065,337.92