Finding the Fourth Proportional to 3,916.62, 5,870.88 and 2,939.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.62 : 5,870.88 = 2,939.76 : x
2. Step 2: Convert to fraction form
   3,916.62/5,870.88 = 2,939.76/x
3. Step 3: Cross multiply
   3,916.62x = 5,870.88 × 2,939.76
4. Step 4: Simplify right side
   3,916.62x = 17,258,978.19
5. Step 5: Solve for x
   x = 17,258,978.19/3,916.62
6. Step 6: Final answer
   x = 4,406.60