Finding the Third Proportional to 156,456 and 242,400

Step by Step Solution

1. Step 1: Write the proportion equation
   156,456 : 242,400 = 242,400 : x
2. Step 2: Convert to fraction form
   156,456/242,400 = 242,400/x
3. Step 3: Cross multiply
   156,456x = 242,400 × 242,400
4. Step 4: Simplify right side
   156,456x = 58,757,760,000
5. Step 5: Solve for x
   x = 58,757,760,000/156,456
6. Step 6: Final answer
   x = 375,554.53