Finding the Third Proportional to 118,406 and 253,700

Step by Step Solution

1. Step 1: Write the proportion equation
   118,406 : 253,700 = 253,700 : x
2. Step 2: Convert to fraction form
   118,406/253,700 = 253,700/x
3. Step 3: Cross multiply
   118,406x = 253,700 × 253,700
4. Step 4: Simplify right side
   118,406x = 64,363,690,000
5. Step 5: Solve for x
   x = 64,363,690,000/118,406
6. Step 6: Final answer
   x = 543,584.70