Finding the Third Proportional to 249,700 and 550,300

Step by Step Solution

1. Step 1: Write the proportion equation
   249,700 : 550,300 = 550,300 : x
2. Step 2: Convert to fraction form
   249,700/550,300 = 550,300/x
3. Step 3: Cross multiply
   249,700x = 550,300 × 550,300
4. Step 4: Simplify right side
   249,700x = 302,830,090,000
5. Step 5: Solve for x
   x = 302,830,090,000/249,700
6. Step 6: Final answer
   x = 1,212,775.69