Finding the Third Proportional to 8,359,776 and 12,507,240

Step by Step Solution

1. Step 1: Write the proportion equation
   8,359,776 : 12,507,240 = 12,507,240 : x
2. Step 2: Convert to fraction form
   8,359,776/12,507,240 = 12,507,240/x
3. Step 3: Cross multiply
   8,359,776x = 12,507,240 × 12,507,240
4. Step 4: Simplify right side
   8,359,776x = 156,431,052,417,600
5. Step 5: Solve for x
   x = 156,431,052,417,600/8,359,776
6. Step 6: Final answer
   x = 18,712,349.76