Finding the Third Proportional to 189,918 and 401,179.50

Step by Step Solution

1. Step 1: Write the proportion equation
   189,918 : 401,179.50 = 401,179.50 : x
2. Step 2: Convert to fraction form
   189,918/401,179.50 = 401,179.50/x
3. Step 3: Cross multiply
   189,918x = 401,179.50 × 401,179.50
4. Step 4: Simplify right side
   189,918x = 160,944,991,220.25
5. Step 5: Solve for x
   x = 160,944,991,220.25/189,918
6. Step 6: Final answer
   x = 847,444.64