Finding the Third Proportional to 5,709,199 and 12,309,640

Step by Step Solution

1. Step 1: Write the proportion equation
   5,709,199 : 12,309,640 = 12,309,640 : x
2. Step 2: Convert to fraction form
   5,709,199/12,309,640 = 12,309,640/x
3. Step 3: Cross multiply
   5,709,199x = 12,309,640 × 12,309,640
4. Step 4: Simplify right side
   5,709,199x = 151,527,236,929,600
5. Step 5: Solve for x
   x = 151,527,236,929,600/5,709,199
6. Step 6: Final answer
   x = 26,540,892.50