Finding the Fourth Proportional to 3,980.43, 5,969.93 and 1,788.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.43 : 5,969.93 = 1,788.77 : x
2. Step 2: Convert to fraction form
   3,980.43/5,969.93 = 1,788.77/x
3. Step 3: Cross multiply
   3,980.43x = 5,969.93 × 1,788.77
4. Step 4: Simplify right side
   3,980.43x = 10,678,792.89
5. Step 5: Solve for x
   x = 10,678,792.89/3,980.43
6. Step 6: Final answer
   x = 2,682.82