Finding the Fourth Proportional to 3,929.05, 5,423.36 and 2,516.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.05 : 5,423.36 = 2,516.55 : x
2. Step 2: Convert to fraction form
   3,929.05/5,423.36 = 2,516.55/x
3. Step 3: Cross multiply
   3,929.05x = 5,423.36 × 2,516.55
4. Step 4: Simplify right side
   3,929.05x = 13,648,156.61
5. Step 5: Solve for x
   x = 13,648,156.61/3,929.05
6. Step 6: Final answer
   x = 3,473.65