Finding the Fourth Proportional to 12,059,469.72, 18,085,316.76 and 3,970,519.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,059,469.72 : 18,085,316.76 = 3,970,519.20 : x
2. Step 2: Convert to fraction form
   12,059,469.72/18,085,316.76 = 3,970,519.20/x
3. Step 3: Cross multiply
   12,059,469.72x = 18,085,316.76 × 3,970,519.20
4. Step 4: Simplify right side
   12,059,469.72x = 71,808,097,433,661.80
5. Step 5: Solve for x
   x = 71,808,097,433,661.80/12,059,469.72
6. Step 6: Final answer
   x = 5,954,498.75