Finding the Fourth Proportional to 15,411.56, 21,270.18 and 10,114.28

Step by Step Solution

1. Step 1: Write the proportion equation
   15,411.56 : 21,270.18 = 10,114.28 : x
2. Step 2: Convert to fraction form
   15,411.56/21,270.18 = 10,114.28/x
3. Step 3: Cross multiply
   15,411.56x = 21,270.18 × 10,114.28
4. Step 4: Simplify right side
   15,411.56x = 215,132,556.17
5. Step 5: Solve for x
   x = 215,132,556.17/15,411.56
6. Step 6: Final answer
   x = 13,959.17