Finding the Third Proportional to 640,782 and 1,364,386

Step by Step Solution

1. Step 1: Write the proportion equation
   640,782 : 1,364,386 = 1,364,386 : x
2. Step 2: Convert to fraction form
   640,782/1,364,386 = 1,364,386/x
3. Step 3: Cross multiply
   640,782x = 1,364,386 × 1,364,386
4. Step 4: Simplify right side
   640,782x = 1,861,549,156,996
5. Step 5: Solve for x
   x = 1,861,549,156,996/640,782
6. Step 6: Final answer
   x = 2,905,120.86