Finding the Third Proportional to 401,805 and 545,701.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,805 : 545,701.50 = 545,701.50 : x
2. Step 2: Convert to fraction form
   401,805/545,701.50 = 545,701.50/x
3. Step 3: Cross multiply
   401,805x = 545,701.50 × 545,701.50
4. Step 4: Simplify right side
   401,805x = 297,790,127,102.25
5. Step 5: Solve for x
   x = 297,790,127,102.25/401,805
6. Step 6: Final answer
   x = 741,130.96