Finding the Fourth Proportional to 3,925.72, 5,871.12 and 3,489.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,925.72 : 5,871.12 = 3,489.76 : x
2. Step 2: Convert to fraction form
   3,925.72/5,871.12 = 3,489.76/x
3. Step 3: Cross multiply
   3,925.72x = 5,871.12 × 3,489.76
4. Step 4: Simplify right side
   3,925.72x = 20,488,799.73
5. Step 5: Solve for x
   x = 20,488,799.73/3,925.72
6. Step 6: Final answer
   x = 5,219.12