Finding the Third Proportional to 164,200.50 and 356,430

Step by Step Solution

1. Step 1: Write the proportion equation
   164,200.50 : 356,430 = 356,430 : x
2. Step 2: Convert to fraction form
   164,200.50/356,430 = 356,430/x
3. Step 3: Cross multiply
   164,200.50x = 356,430 × 356,430
4. Step 4: Simplify right side
   164,200.50x = 127,042,344,900
5. Step 5: Solve for x
   x = 127,042,344,900/164,200.50
6. Step 6: Final answer
   x = 773,702.55