Finding the Fourth Proportional to 11,005,284.10, 16,507,926.15 and 8,485,860.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,005,284.10 : 16,507,926.15 = 8,485,860.10 : x
2. Step 2: Convert to fraction form
   11,005,284.10/16,507,926.15 = 8,485,860.10/x
3. Step 3: Cross multiply
   11,005,284.10x = 16,507,926.15 × 8,485,860.10
4. Step 4: Simplify right side
   11,005,284.10x = 140,083,951,850,031.61
5. Step 5: Solve for x
   x = 140,083,951,850,031.61/11,005,284.10
6. Step 6: Final answer
   x = 12,728,790.15