Finding the Third Proportional to 314,331 and 678,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   314,331 : 678,475.50 = 678,475.50 : x
2. Step 2: Convert to fraction form
   314,331/678,475.50 = 678,475.50/x
3. Step 3: Cross multiply
   314,331x = 678,475.50 × 678,475.50
4. Step 4: Simplify right side
   314,331x = 460,329,004,100.25
5. Step 5: Solve for x
   x = 460,329,004,100.25/314,331
6. Step 6: Final answer
   x = 1,464,472.18