Finding the Third Proportional to 928,643 and 1,388,695

Step by Step Solution

1. Step 1: Write the proportion equation
   928,643 : 1,388,695 = 1,388,695 : x
2. Step 2: Convert to fraction form
   928,643/1,388,695 = 1,388,695/x
3. Step 3: Cross multiply
   928,643x = 1,388,695 × 1,388,695
4. Step 4: Simplify right side
   928,643x = 1,928,473,803,025
5. Step 5: Solve for x
   x = 1,928,473,803,025/928,643
6. Step 6: Final answer
   x = 2,076,657.88