Finding the Fourth Proportional to 5,429.81, 8,139.18 and 2,141.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.81 : 8,139.18 = 2,141.08 : x
2. Step 2: Convert to fraction form
   5,429.81/8,139.18 = 2,141.08/x
3. Step 3: Cross multiply
   5,429.81x = 8,139.18 × 2,141.08
4. Step 4: Simplify right side
   5,429.81x = 17,426,635.51
5. Step 5: Solve for x
   x = 17,426,635.51/5,429.81
6. Step 6: Final answer
   x = 3,209.44