Finding the Fourth Proportional to 10,520.52, 15,776.16 and 3,942.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,520.52 : 15,776.16 = 3,942.09 : x
2. Step 2: Convert to fraction form
   10,520.52/15,776.16 = 3,942.09/x
3. Step 3: Cross multiply
   10,520.52x = 15,776.16 × 3,942.09
4. Step 4: Simplify right side
   10,520.52x = 62,191,042.57
5. Step 5: Solve for x
   x = 62,191,042.57/10,520.52
6. Step 6: Final answer
   x = 5,911.40