Finding the Fourth Proportional to 1,770.78, 2,443.50 and 984.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.78 : 2,443.50 = 984.76 : x
2. Step 2: Convert to fraction form
   1,770.78/2,443.50 = 984.76/x
3. Step 3: Cross multiply
   1,770.78x = 2,443.50 × 984.76
4. Step 4: Simplify right side
   1,770.78x = 2,406,261.06
5. Step 5: Solve for x
   x = 2,406,261.06/1,770.78
6. Step 6: Final answer
   x = 1,358.87