Finding the Fourth Proportional to 12,111,067.40, 18,170,107.61 and 3,591,608.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111,067.40 : 18,170,107.61 = 3,591,608.90 : x
2. Step 2: Convert to fraction form
   12,111,067.40/18,170,107.61 = 3,591,608.90/x
3. Step 3: Cross multiply
   12,111,067.40x = 18,170,107.61 × 3,591,608.90
4. Step 4: Simplify right side
   12,111,067.40x = 65,259,920,097,225.15
5. Step 5: Solve for x
   x = 65,259,920,097,225.15/12,111,067.40
6. Step 6: Final answer
   x = 5,388,453.22