Finding the Third Proportional to 143,632 and 315,488

Step by Step Solution

1. Step 1: Write the proportion equation
   143,632 : 315,488 = 315,488 : x
2. Step 2: Convert to fraction form
   143,632/315,488 = 315,488/x
3. Step 3: Cross multiply
   143,632x = 315,488 × 315,488
4. Step 4: Simplify right side
   143,632x = 99,532,678,144
5. Step 5: Solve for x
   x = 99,532,678,144/143,632
6. Step 6: Final answer
   x = 692,970.08