Finding the Third Proportional to 856,816 and 1,861,129

Step by Step Solution

1. Step 1: Write the proportion equation
   856,816 : 1,861,129 = 1,861,129 : x
2. Step 2: Convert to fraction form
   856,816/1,861,129 = 1,861,129/x
3. Step 3: Cross multiply
   856,816x = 1,861,129 × 1,861,129
4. Step 4: Simplify right side
   856,816x = 3,463,801,154,641
5. Step 5: Solve for x
   x = 3,463,801,154,641/856,816
6. Step 6: Final answer
   x = 4,042,642.94