Finding the Third Proportional to 406,602.50 and 858,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,602.50 : 858,980.50 = 858,980.50 : x
2. Step 2: Convert to fraction form
   406,602.50/858,980.50 = 858,980.50/x
3. Step 3: Cross multiply
   406,602.50x = 858,980.50 × 858,980.50
4. Step 4: Simplify right side
   406,602.50x = 737,847,499,380.25
5. Step 5: Solve for x
   x = 737,847,499,380.25/406,602.50
6. Step 6: Final answer
   x = 1,814,665.43