Finding the Third Proportional to 118,405.50 and 253,698

Step by Step Solution

1. Step 1: Write the proportion equation
   118,405.50 : 253,698 = 253,698 : x
2. Step 2: Convert to fraction form
   118,405.50/253,698 = 253,698/x
3. Step 3: Cross multiply
   118,405.50x = 253,698 × 253,698
4. Step 4: Simplify right side
   118,405.50x = 64,362,675,204
5. Step 5: Solve for x
   x = 64,362,675,204/118,405.50
6. Step 6: Final answer
   x = 543,578.43