Finding the Third Proportional to 400,171.50 and 610,420.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,171.50 : 610,420.50 = 610,420.50 : x
2. Step 2: Convert to fraction form
   400,171.50/610,420.50 = 610,420.50/x
3. Step 3: Cross multiply
   400,171.50x = 610,420.50 × 610,420.50
4. Step 4: Simplify right side
   400,171.50x = 372,613,186,820.25
5. Step 5: Solve for x
   x = 372,613,186,820.25/400,171.50
6. Step 6: Final answer
   x = 931,133.74