Finding the Third Proportional to 555,072 and 1,309,888

Step by Step Solution

1. Step 1: Write the proportion equation
   555,072 : 1,309,888 = 1,309,888 : x
2. Step 2: Convert to fraction form
   555,072/1,309,888 = 1,309,888/x
3. Step 3: Cross multiply
   555,072x = 1,309,888 × 1,309,888
4. Step 4: Simplify right side
   555,072x = 1,715,806,572,544
5. Step 5: Solve for x
   x = 1,715,806,572,544/555,072
6. Step 6: Final answer
   x = 3,091,142.36