Finding the Third Proportional to 428,678 and 931,156

Step by Step Solution

1. Step 1: Write the proportion equation
   428,678 : 931,156 = 931,156 : x
2. Step 2: Convert to fraction form
   428,678/931,156 = 931,156/x
3. Step 3: Cross multiply
   428,678x = 931,156 × 931,156
4. Step 4: Simplify right side
   428,678x = 867,051,496,336
5. Step 5: Solve for x
   x = 867,051,496,336/428,678
6. Step 6: Final answer
   x = 2,022,617.20