Finding the Third Proportional to 401,322 and 550,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,322 : 550,312.50 = 550,312.50 : x
2. Step 2: Convert to fraction form
   401,322/550,312.50 = 550,312.50/x
3. Step 3: Cross multiply
   401,322x = 550,312.50 × 550,312.50
4. Step 4: Simplify right side
   401,322x = 302,843,847,656.25
5. Step 5: Solve for x
   x = 302,843,847,656.25/401,322
6. Step 6: Final answer
   x = 754,615.61