Finding the Third Proportional to 196,859.50 and 406,842

Step by Step Solution

1. Step 1: Write the proportion equation
   196,859.50 : 406,842 = 406,842 : x
2. Step 2: Convert to fraction form
   196,859.50/406,842 = 406,842/x
3. Step 3: Cross multiply
   196,859.50x = 406,842 × 406,842
4. Step 4: Simplify right side
   196,859.50x = 165,520,412,964
5. Step 5: Solve for x
   x = 165,520,412,964/196,859.50
6. Step 6: Final answer
   x = 840,804.80