Finding the Third Proportional to 857,148 and 1,866,684

Step by Step Solution

1. Step 1: Write the proportion equation
   857,148 : 1,866,684 = 1,866,684 : x
2. Step 2: Convert to fraction form
   857,148/1,866,684 = 1,866,684/x
3. Step 3: Cross multiply
   857,148x = 1,866,684 × 1,866,684
4. Step 4: Simplify right side
   857,148x = 3,484,509,155,856
5. Step 5: Solve for x
   x = 3,484,509,155,856/857,148
6. Step 6: Final answer
   x = 4,065,236.29