Finding the Fourth Proportional to 3,870.69, 5,806.82 and 1,238.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.69 : 5,806.82 = 1,238.32 : x
2. Step 2: Convert to fraction form
   3,870.69/5,806.82 = 1,238.32/x
3. Step 3: Cross multiply
   3,870.69x = 5,806.82 × 1,238.32
4. Step 4: Simplify right side
   3,870.69x = 7,190,711.70
5. Step 5: Solve for x
   x = 7,190,711.70/3,870.69
6. Step 6: Final answer
   x = 1,857.74