Finding the Fourth Proportional to 3,994.41, 5,989.59 and 1,220.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,994.41 : 5,989.59 = 1,220.43 : x
2. Step 2: Convert to fraction form
   3,994.41/5,989.59 = 1,220.43/x
3. Step 3: Cross multiply
   3,994.41x = 5,989.59 × 1,220.43
4. Step 4: Simplify right side
   3,994.41x = 7,309,875.32
5. Step 5: Solve for x
   x = 7,309,875.32/3,994.41
6. Step 6: Final answer
   x = 1,830.03