Finding the Fourth Proportional to 5,426.81, 8,140.82 and 1,728.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,426.81 : 8,140.82 = 1,728.18 : x
2. Step 2: Convert to fraction form
   5,426.81/8,140.82 = 1,728.18/x
3. Step 3: Cross multiply
   5,426.81x = 8,140.82 × 1,728.18
4. Step 4: Simplify right side
   5,426.81x = 14,068,802.31
5. Step 5: Solve for x
   x = 14,068,802.31/5,426.81
6. Step 6: Final answer
   x = 2,592.46