Finding the Third Proportional to 572,628 and 1,221,090

Step by Step Solution

1. Step 1: Write the proportion equation
   572,628 : 1,221,090 = 1,221,090 : x
2. Step 2: Convert to fraction form
   572,628/1,221,090 = 1,221,090/x
3. Step 3: Cross multiply
   572,628x = 1,221,090 × 1,221,090
4. Step 4: Simplify right side
   572,628x = 1,491,060,788,100
5. Step 5: Solve for x
   x = 1,491,060,788,100/572,628
6. Step 6: Final answer
   x = 2,603,890.81