Finding the Fourth Proportional to 1,868.52, 2,578.51 and 1,071.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.52 : 2,578.51 = 1,071.98 : x
2. Step 2: Convert to fraction form
   1,868.52/2,578.51 = 1,071.98/x
3. Step 3: Cross multiply
   1,868.52x = 2,578.51 × 1,071.98
4. Step 4: Simplify right side
   1,868.52x = 2,764,105.25
5. Step 5: Solve for x
   x = 2,764,105.25/1,868.52
6. Step 6: Final answer
   x = 1,479.30