Finding the Third Proportional to 428,940 and 928,488

Step by Step Solution

1. Step 1: Write the proportion equation
   428,940 : 928,488 = 928,488 : x
2. Step 2: Convert to fraction form
   428,940/928,488 = 928,488/x
3. Step 3: Cross multiply
   428,940x = 928,488 × 928,488
4. Step 4: Simplify right side
   428,940x = 862,089,966,144
5. Step 5: Solve for x
   x = 862,089,966,144/428,940
6. Step 6: Final answer
   x = 2,009,814.81