Finding the Third Proportional to 572,390 and 1,243,111

Step by Step Solution

1. Step 1: Write the proportion equation
   572,390 : 1,243,111 = 1,243,111 : x
2. Step 2: Convert to fraction form
   572,390/1,243,111 = 1,243,111/x
3. Step 3: Cross multiply
   572,390x = 1,243,111 × 1,243,111
4. Step 4: Simplify right side
   572,390x = 1,545,324,958,321
5. Step 5: Solve for x
   x = 1,545,324,958,321/572,390
6. Step 6: Final answer
   x = 2,699,776.30