Finding the Fourth Proportional to 3,902.38, 5,853.76 and 980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,902.38 : 5,853.76 = 980.72 : x
2. Step 2: Convert to fraction form
   3,902.38/5,853.76 = 980.72/x
3. Step 3: Cross multiply
   3,902.38x = 5,853.76 × 980.72
4. Step 4: Simplify right side
   3,902.38x = 5,740,899.51
5. Step 5: Solve for x
   x = 5,740,899.51/3,902.38
6. Step 6: Final answer
   x = 1,471.13