Finding the Fourth Proportional to 1,994.06, 2,749.88 and 1,320.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,994.06 : 2,749.88 = 1,320.80 : x
2. Step 2: Convert to fraction form
   1,994.06/2,749.88 = 1,320.80/x
3. Step 3: Cross multiply
   1,994.06x = 2,749.88 × 1,320.80
4. Step 4: Simplify right side
   1,994.06x = 3,632,041.50
5. Step 5: Solve for x
   x = 3,632,041.50/1,994.06
6. Step 6: Final answer
   x = 1,821.43