Finding the Fourth Proportional to 3,978,899.20, 5,970,112.32 and 2,085,190.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,899.20 : 5,970,112.32 = 2,085,190.08 : x
2. Step 2: Convert to fraction form
   3,978,899.20/5,970,112.32 = 2,085,190.08/x
3. Step 3: Cross multiply
   3,978,899.20x = 5,970,112.32 × 2,085,190.08
4. Step 4: Simplify right side
   3,978,899.20x = 12,448,818,986,149.79
5. Step 5: Solve for x
   x = 12,448,818,986,149.79/3,978,899.20
6. Step 6: Final answer
   x = 3,128,709.31