Finding the Third Proportional to 311,412 and 443,784

Step by Step Solution

1. Step 1: Write the proportion equation
   311,412 : 443,784 = 443,784 : x
2. Step 2: Convert to fraction form
   311,412/443,784 = 443,784/x
3. Step 3: Cross multiply
   311,412x = 443,784 × 443,784
4. Step 4: Simplify right side
   311,412x = 196,944,238,656
5. Step 5: Solve for x
   x = 196,944,238,656/311,412
6. Step 6: Final answer
   x = 632,423.41