Finding the Third Proportional to 138,352.50 and 304,488

Step by Step Solution

1. Step 1: Write the proportion equation
   138,352.50 : 304,488 = 304,488 : x
2. Step 2: Convert to fraction form
   138,352.50/304,488 = 304,488/x
3. Step 3: Cross multiply
   138,352.50x = 304,488 × 304,488
4. Step 4: Simplify right side
   138,352.50x = 92,712,942,144
5. Step 5: Solve for x
   x = 92,712,942,144/138,352.50
6. Step 6: Final answer
   x = 670,121.19