Finding the Third Proportional to 857,131 and 1,281,490

Step by Step Solution

1. Step 1: Write the proportion equation
   857,131 : 1,281,490 = 1,281,490 : x
2. Step 2: Convert to fraction form
   857,131/1,281,490 = 1,281,490/x
3. Step 3: Cross multiply
   857,131x = 1,281,490 × 1,281,490
4. Step 4: Simplify right side
   857,131x = 1,642,216,620,100
5. Step 5: Solve for x
   x = 1,642,216,620,100/857,131
6. Step 6: Final answer
   x = 1,915,945.89