Finding the Fourth Proportional to 3,871.29, 5,802.30 and 1,788.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.29 : 5,802.30 = 1,788.45 : x
2. Step 2: Convert to fraction form
   3,871.29/5,802.30 = 1,788.45/x
3. Step 3: Cross multiply
   3,871.29x = 5,802.30 × 1,788.45
4. Step 4: Simplify right side
   3,871.29x = 10,377,123.44
5. Step 5: Solve for x
   x = 10,377,123.44/3,871.29
6. Step 6: Final answer
   x = 2,680.53