Finding the Third Proportional to 216,440 and 474,392

Step by Step Solution

1. Step 1: Write the proportion equation
   216,440 : 474,392 = 474,392 : x
2. Step 2: Convert to fraction form
   216,440/474,392 = 474,392/x
3. Step 3: Cross multiply
   216,440x = 474,392 × 474,392
4. Step 4: Simplify right side
   216,440x = 225,047,769,664
5. Step 5: Solve for x
   x = 225,047,769,664/216,440
6. Step 6: Final answer
   x = 1,039,769.77