Finding the Fourth Proportional to 10,082.79, 15,128.52 and 3,505.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,082.79 : 15,128.52 = 3,505.39 : x
2. Step 2: Convert to fraction form
   10,082.79/15,128.52 = 3,505.39/x
3. Step 3: Cross multiply
   10,082.79x = 15,128.52 × 3,505.39
4. Step 4: Simplify right side
   10,082.79x = 53,031,362.72
5. Step 5: Solve for x
   x = 53,031,362.72/10,082.79
6. Step 6: Final answer
   x = 5,259.59