Finding the Third Proportional to 1,787,312 and 3,889,128

Step by Step Solution

1. Step 1: Write the proportion equation
   1,787,312 : 3,889,128 = 3,889,128 : x
2. Step 2: Convert to fraction form
   1,787,312/3,889,128 = 3,889,128/x
3. Step 3: Cross multiply
   1,787,312x = 3,889,128 × 3,889,128
4. Step 4: Simplify right side
   1,787,312x = 15,125,316,600,384
5. Step 5: Solve for x
   x = 15,125,316,600,384/1,787,312
6. Step 6: Final answer
   x = 8,462,605.63