Finding the Third Proportional to 611,820 and 1,312,185

Step by Step Solution

1. Step 1: Write the proportion equation
   611,820 : 1,312,185 = 1,312,185 : x
2. Step 2: Convert to fraction form
   611,820/1,312,185 = 1,312,185/x
3. Step 3: Cross multiply
   611,820x = 1,312,185 × 1,312,185
4. Step 4: Simplify right side
   611,820x = 1,721,829,474,225
5. Step 5: Solve for x
   x = 1,721,829,474,225/611,820
6. Step 6: Final answer
   x = 2,814,274.58