Finding the Third Proportional to 1,220,174 and 1,855,139

Step by Step Solution

1. Step 1: Write the proportion equation
   1,220,174 : 1,855,139 = 1,855,139 : x
2. Step 2: Convert to fraction form
   1,220,174/1,855,139 = 1,855,139/x
3. Step 3: Cross multiply
   1,220,174x = 1,855,139 × 1,855,139
4. Step 4: Simplify right side
   1,220,174x = 3,441,540,709,321
5. Step 5: Solve for x
   x = 3,441,540,709,321/1,220,174
6. Step 6: Final answer
   x = 2,820,532.73