Finding the Fourth Proportional to 10,085.78, 15,118.35 and 3,506.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.78 : 15,118.35 = 3,506.56 : x
2. Step 2: Convert to fraction form
   10,085.78/15,118.35 = 3,506.56/x
3. Step 3: Cross multiply
   10,085.78x = 15,118.35 × 3,506.56
4. Step 4: Simplify right side
   10,085.78x = 53,013,401.38
5. Step 5: Solve for x
   x = 53,013,401.38/10,085.78
6. Step 6: Final answer
   x = 5,256.25