Finding the Third Proportional to 611,811 and 1,312,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   611,811 : 1,312,168.50 = 1,312,168.50 : x
2. Step 2: Convert to fraction form
   611,811/1,312,168.50 = 1,312,168.50/x
3. Step 3: Cross multiply
   611,811x = 1,312,168.50 × 1,312,168.50
4. Step 4: Simplify right side
   611,811x = 1,721,786,172,392.25
5. Step 5: Solve for x
   x = 1,721,786,172,392.25/611,811
6. Step 6: Final answer
   x = 2,814,245.20