Finding the Third Proportional to 8,561,580 and 12,558,546

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561,580 : 12,558,546 = 12,558,546 : x
2. Step 2: Convert to fraction form
   8,561,580/12,558,546 = 12,558,546/x
3. Step 3: Cross multiply
   8,561,580x = 12,558,546 × 12,558,546
4. Step 4: Simplify right side
   8,561,580x = 157,717,077,634,116
5. Step 5: Solve for x
   x = 157,717,077,634,116/8,561,580
6. Step 6: Final answer
   x = 18,421,492.02