Finding the Fourth Proportional to 2,801.24, 3,859.56 and 1,868.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.24 : 3,859.56 = 1,868.12 : x
2. Step 2: Convert to fraction form
   2,801.24/3,859.56 = 1,868.12/x
3. Step 3: Cross multiply
   2,801.24x = 3,859.56 × 1,868.12
4. Step 4: Simplify right side
   2,801.24x = 7,210,121.23
5. Step 5: Solve for x
   x = 7,210,121.23/2,801.24
6. Step 6: Final answer
   x = 2,573.90