Finding the Third Proportional to 189,580 and 438,886

Step by Step Solution

1. Step 1: Write the proportion equation
   189,580 : 438,886 = 438,886 : x
2. Step 2: Convert to fraction form
   189,580/438,886 = 438,886/x
3. Step 3: Cross multiply
   189,580x = 438,886 × 438,886
4. Step 4: Simplify right side
   189,580x = 192,620,920,996
5. Step 5: Solve for x
   x = 192,620,920,996/189,580
6. Step 6: Final answer
   x = 1,016,040.30