Finding the Third Proportional to 155,316 and 245,488

Step by Step Solution

1. Step 1: Write the proportion equation
   155,316 : 245,488 = 245,488 : x
2. Step 2: Convert to fraction form
   155,316/245,488 = 245,488/x
3. Step 3: Cross multiply
   155,316x = 245,488 × 245,488
4. Step 4: Simplify right side
   155,316x = 60,264,358,144
5. Step 5: Solve for x
   x = 60,264,358,144/155,316
6. Step 6: Final answer
   x = 388,011.27