Finding the Third Proportional to 311,415 and 443,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,415 : 443,788.50 = 443,788.50 : x
2. Step 2: Convert to fraction form
   311,415/443,788.50 = 443,788.50/x
3. Step 3: Cross multiply
   311,415x = 443,788.50 × 443,788.50
4. Step 4: Simplify right side
   311,415x = 196,948,232,732.25
5. Step 5: Solve for x
   x = 196,948,232,732.25/311,415
6. Step 6: Final answer
   x = 632,430.14