Finding the Third Proportional to 278,886 and 574,282.50

Step by Step Solution

1. Step 1: Write the proportion equation
   278,886 : 574,282.50 = 574,282.50 : x
2. Step 2: Convert to fraction form
   278,886/574,282.50 = 574,282.50/x
3. Step 3: Cross multiply
   278,886x = 574,282.50 × 574,282.50
4. Step 4: Simplify right side
   278,886x = 329,800,389,806.25
5. Step 5: Solve for x
   x = 329,800,389,806.25/278,886
6. Step 6: Final answer
   x = 1,182,563.45