Finding the Third Proportional to 191,909.25 and 405,961.88

Step by Step Solution

1. Step 1: Write the proportion equation
   191,909.25 : 405,961.88 = 405,961.88 : x
2. Step 2: Convert to fraction form
   191,909.25/405,961.88 = 405,961.88/x
3. Step 3: Cross multiply
   191,909.25x = 405,961.88 × 405,961.88
4. Step 4: Simplify right side
   191,909.25x = 164,805,043,953.52
5. Step 5: Solve for x
   x = 164,805,043,953.52/191,909.25
6. Step 6: Final answer
   x = 858,765.50