Finding the Fourth Proportional to 2,799.77, 4,195.94 and 2,147.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.77 : 4,195.94 = 2,147.31 : x
2. Step 2: Convert to fraction form
   2,799.77/4,195.94 = 2,147.31/x
3. Step 3: Cross multiply
   2,799.77x = 4,195.94 × 2,147.31
4. Step 4: Simplify right side
   2,799.77x = 9,009,973.18
5. Step 5: Solve for x
   x = 9,009,973.18/2,799.77
6. Step 6: Final answer
   x = 3,218.12