Finding the Third Proportional to 858,288 and 1,261,156

Step by Step Solution

1. Step 1: Write the proportion equation
   858,288 : 1,261,156 = 1,261,156 : x
2. Step 2: Convert to fraction form
   858,288/1,261,156 = 1,261,156/x
3. Step 3: Cross multiply
   858,288x = 1,261,156 × 1,261,156
4. Step 4: Simplify right side
   858,288x = 1,590,514,456,336
5. Step 5: Solve for x
   x = 1,590,514,456,336/858,288
6. Step 6: Final answer
   x = 1,853,124.42