Finding the Third Proportional to 645,490 and 1,364,858

Step by Step Solution

1. Step 1: Write the proportion equation
   645,490 : 1,364,858 = 1,364,858 : x
2. Step 2: Convert to fraction form
   645,490/1,364,858 = 1,364,858/x
3. Step 3: Cross multiply
   645,490x = 1,364,858 × 1,364,858
4. Step 4: Simplify right side
   645,490x = 1,862,837,360,164
5. Step 5: Solve for x
   x = 1,862,837,360,164/645,490
6. Step 6: Final answer
   x = 2,885,927.53