Finding the Third Proportional to 401,370 and 550,387.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,370 : 550,387.50 = 550,387.50 : x
2. Step 2: Convert to fraction form
   401,370/550,387.50 = 550,387.50/x
3. Step 3: Cross multiply
   401,370x = 550,387.50 × 550,387.50
4. Step 4: Simplify right side
   401,370x = 302,926,400,156.25
5. Step 5: Solve for x
   x = 302,926,400,156.25/401,370
6. Step 6: Final answer
   x = 754,731.05