Finding the Third Proportional to 156,168 and 342,144

Step by Step Solution

1. Step 1: Write the proportion equation
   156,168 : 342,144 = 342,144 : x
2. Step 2: Convert to fraction form
   156,168/342,144 = 342,144/x
3. Step 3: Cross multiply
   156,168x = 342,144 × 342,144
4. Step 4: Simplify right side
   156,168x = 117,062,516,736
5. Step 5: Solve for x
   x = 117,062,516,736/156,168
6. Step 6: Final answer
   x = 749,593.49