Finding the Fourth Proportional to 3,978,866.88, 5,970,064.32 and 2,085,158.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,866.88 : 5,970,064.32 = 2,085,158.08 : x
2. Step 2: Convert to fraction form
   3,978,866.88/5,970,064.32 = 2,085,158.08/x
3. Step 3: Cross multiply
   3,978,866.88x = 5,970,064.32 × 2,085,158.08
4. Step 4: Simplify right side
   3,978,866.88x = 12,448,527,854,967.71
5. Step 5: Solve for x
   x = 12,448,527,854,967.71/3,978,866.88
6. Step 6: Final answer
   x = 3,128,661.56