Finding the Third Proportional to 400,161 and 610,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,161 : 610,405.50 = 610,405.50 : x
2. Step 2: Convert to fraction form
   400,161/610,405.50 = 610,405.50/x
3. Step 3: Cross multiply
   400,161x = 610,405.50 × 610,405.50
4. Step 4: Simplify right side
   400,161x = 372,594,874,430.25
5. Step 5: Solve for x
   x = 372,594,874,430.25/400,161
6. Step 6: Final answer
   x = 931,112.41