Finding the Third Proportional to 469,539 and 678,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   469,539 : 678,271.50 = 678,271.50 : x
2. Step 2: Convert to fraction form
   469,539/678,271.50 = 678,271.50/x
3. Step 3: Cross multiply
   469,539x = 678,271.50 × 678,271.50
4. Step 4: Simplify right side
   469,539x = 460,052,227,712.25
5. Step 5: Solve for x
   x = 460,052,227,712.25/469,539
6. Step 6: Final answer
   x = 979,795.56