Finding the Third Proportional to 191,650.50 and 420,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,650.50 : 420,109.50 = 420,109.50 : x
2. Step 2: Convert to fraction form
   191,650.50/420,109.50 = 420,109.50/x
3. Step 3: Cross multiply
   191,650.50x = 420,109.50 × 420,109.50
4. Step 4: Simplify right side
   191,650.50x = 176,491,991,990.25
5. Step 5: Solve for x
   x = 176,491,991,990.25/191,650.50
6. Step 6: Final answer
   x = 920,905.46