Finding the Fourth Proportional to 1,770.66, 2,443.50 and 984.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.66 : 2,443.50 = 984.78 : x
2. Step 2: Convert to fraction form
   1,770.66/2,443.50 = 984.78/x
3. Step 3: Cross multiply
   1,770.66x = 2,443.50 × 984.78
4. Step 4: Simplify right side
   1,770.66x = 2,406,309.93
5. Step 5: Solve for x
   x = 2,406,309.93/1,770.66
6. Step 6: Final answer
   x = 1,358.99