Finding the Fourth Proportional to 3,123.58, 4,309.59 and 2,190.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.58 : 4,309.59 = 2,190.46 : x
2. Step 2: Convert to fraction form
   3,123.58/4,309.59 = 2,190.46/x
3. Step 3: Cross multiply
   3,123.58x = 4,309.59 × 2,190.46
4. Step 4: Simplify right side
   3,123.58x = 9,439,984.51
5. Step 5: Solve for x
   x = 9,439,984.51/3,123.58
6. Step 6: Final answer
   x = 3,022.17