Finding the Third Proportional to 2,128,377 and 4,729,143

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,377 : 4,729,143 = 4,729,143 : x
2. Step 2: Convert to fraction form
   2,128,377/4,729,143 = 4,729,143/x
3. Step 3: Cross multiply
   2,128,377x = 4,729,143 × 4,729,143
4. Step 4: Simplify right side
   2,128,377x = 22,364,793,514,449
5. Step 5: Solve for x
   x = 22,364,793,514,449/2,128,377
6. Step 6: Final answer
   x = 10,507,909.79