Finding the Third Proportional to 856,340 and 1,865,243

Step by Step Solution

1. Step 1: Write the proportion equation
   856,340 : 1,865,243 = 1,865,243 : x
2. Step 2: Convert to fraction form
   856,340/1,865,243 = 1,865,243/x
3. Step 3: Cross multiply
   856,340x = 1,865,243 × 1,865,243
4. Step 4: Simplify right side
   856,340x = 3,479,131,449,049
5. Step 5: Solve for x
   x = 3,479,131,449,049/856,340
6. Step 6: Final answer
   x = 4,062,792.17