Finding the Third Proportional to 190,539 and 406,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,539 : 406,390.50 = 406,390.50 : x
2. Step 2: Convert to fraction form
   190,539/406,390.50 = 406,390.50/x
3. Step 3: Cross multiply
   190,539x = 406,390.50 × 406,390.50
4. Step 4: Simplify right side
   190,539x = 165,153,238,490.25
5. Step 5: Solve for x
   x = 165,153,238,490.25/190,539
6. Step 6: Final answer
   x = 866,768.69