Finding the Third Proportional to 400,156.50 and 610,398

Step by Step Solution

1. Step 1: Write the proportion equation
   400,156.50 : 610,398 = 610,398 : x
2. Step 2: Convert to fraction form
   400,156.50/610,398 = 610,398/x
3. Step 3: Cross multiply
   400,156.50x = 610,398 × 610,398
4. Step 4: Simplify right side
   400,156.50x = 372,585,718,404
5. Step 5: Solve for x
   x = 372,585,718,404/400,156.50
6. Step 6: Final answer
   x = 931,100.00