Finding the Third Proportional to 319,527 and 688,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   319,527 : 688,855.50 = 688,855.50 : x
2. Step 2: Convert to fraction form
   319,527/688,855.50 = 688,855.50/x
3. Step 3: Cross multiply
   319,527x = 688,855.50 × 688,855.50
4. Step 4: Simplify right side
   319,527x = 474,521,899,880.25
5. Step 5: Solve for x
   x = 474,521,899,880.25/319,527
6. Step 6: Final answer
   x = 1,485,076.07