Finding the Third Proportional to 12,983,116 and 20,209,538

Step by Step Solution

1. Step 1: Write the proportion equation
   12,983,116 : 20,209,538 = 20,209,538 : x
2. Step 2: Convert to fraction form
   12,983,116/20,209,538 = 20,209,538/x
3. Step 3: Cross multiply
   12,983,116x = 20,209,538 × 20,209,538
4. Step 4: Simplify right side
   12,983,116x = 408,425,426,173,444
5. Step 5: Solve for x
   x = 408,425,426,173,444/12,983,116
6. Step 6: Final answer
   x = 31,458,197.41