Finding the Third Proportional to 136,684 and 280,172

Step by Step Solution

1. Step 1: Write the proportion equation
   136,684 : 280,172 = 280,172 : x
2. Step 2: Convert to fraction form
   136,684/280,172 = 280,172/x
3. Step 3: Cross multiply
   136,684x = 280,172 × 280,172
4. Step 4: Simplify right side
   136,684x = 78,496,349,584
5. Step 5: Solve for x
   x = 78,496,349,584/136,684
6. Step 6: Final answer
   x = 574,290.70