Finding the Fourth Proportional to 3,870.28, 5,805.33 and 948.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.28 : 5,805.33 = 948.57 : x
2. Step 2: Convert to fraction form
   3,870.28/5,805.33 = 948.57/x
3. Step 3: Cross multiply
   3,870.28x = 5,805.33 × 948.57
4. Step 4: Simplify right side
   3,870.28x = 5,506,761.88
5. Step 5: Solve for x
   x = 5,506,761.88/3,870.28
6. Step 6: Final answer
   x = 1,422.83