Finding the Fourth Proportional to 1,907.81, 2,857.71 and 980.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,907.81 : 2,857.71 = 980.54 : x
2. Step 2: Convert to fraction form
   1,907.81/2,857.71 = 980.54/x
3. Step 3: Cross multiply
   1,907.81x = 2,857.71 × 980.54
4. Step 4: Simplify right side
   1,907.81x = 2,802,098.96
5. Step 5: Solve for x
   x = 2,802,098.96/1,907.81
6. Step 6: Final answer
   x = 1,468.75