Finding the Third Proportional to 400,162.50 and 610,407

Step by Step Solution

1. Step 1: Write the proportion equation
   400,162.50 : 610,407 = 610,407 : x
2. Step 2: Convert to fraction form
   400,162.50/610,407 = 610,407/x
3. Step 3: Cross multiply
   400,162.50x = 610,407 × 610,407
4. Step 4: Simplify right side
   400,162.50x = 372,596,705,649
5. Step 5: Solve for x
   x = 372,596,705,649/400,162.50
6. Step 6: Final answer
   x = 931,113.50