Finding the Third Proportional to 278,898 and 574,300

Step by Step Solution

1. Step 1: Write the proportion equation
   278,898 : 574,300 = 574,300 : x
2. Step 2: Convert to fraction form
   278,898/574,300 = 574,300/x
3. Step 3: Cross multiply
   278,898x = 574,300 × 574,300
4. Step 4: Simplify right side
   278,898x = 329,820,490,000
5. Step 5: Solve for x
   x = 329,820,490,000/278,898
6. Step 6: Final answer
   x = 1,182,584.64