Finding the Fourth Proportional to 1,904.78, 2,854.89 and 980.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,904.78 : 2,854.89 = 980.78 : x
2. Step 2: Convert to fraction form
   1,904.78/2,854.89 = 980.78/x
3. Step 3: Cross multiply
   1,904.78x = 2,854.89 × 980.78
4. Step 4: Simplify right side
   1,904.78x = 2,800,019.01
5. Step 5: Solve for x
   x = 2,800,019.01/1,904.78
6. Step 6: Final answer
   x = 1,470.00