Finding the Third Proportional to 388,271.50 and 830,519.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,271.50 : 830,519.50 = 830,519.50 : x
2. Step 2: Convert to fraction form
   388,271.50/830,519.50 = 830,519.50/x
3. Step 3: Cross multiply
   388,271.50x = 830,519.50 × 830,519.50
4. Step 4: Simplify right side
   388,271.50x = 689,762,639,880.25
5. Step 5: Solve for x
   x = 689,762,639,880.25/388,271.50
6. Step 6: Final answer
   x = 1,776,495.67