Finding the Third Proportional to 191,913 and 405,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,913 : 405,969.50 = 405,969.50 : x
2. Step 2: Convert to fraction form
   191,913/405,969.50 = 405,969.50/x
3. Step 3: Cross multiply
   191,913x = 405,969.50 × 405,969.50
4. Step 4: Simplify right side
   191,913x = 164,811,234,930.25
5. Step 5: Solve for x
   x = 164,811,234,930.25/191,913
6. Step 6: Final answer
   x = 858,780.98