Finding the Third Proportional to 401,368.50 and 550,389

Step by Step Solution

1. Step 1: Write the proportion equation
   401,368.50 : 550,389 = 550,389 : x
2. Step 2: Convert to fraction form
   401,368.50/550,389 = 550,389/x
3. Step 3: Cross multiply
   401,368.50x = 550,389 × 550,389
4. Step 4: Simplify right side
   401,368.50x = 302,928,051,321
5. Step 5: Solve for x
   x = 302,928,051,321/401,368.50
6. Step 6: Final answer
   x = 754,737.98