Finding the Fourth Proportional to 11,503.56, 15,853.86 and 8,354.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,503.56 : 15,853.86 = 8,354.28 : x
2. Step 2: Convert to fraction form
   11,503.56/15,853.86 = 8,354.28/x
3. Step 3: Cross multiply
   11,503.56x = 15,853.86 × 8,354.28
4. Step 4: Simplify right side
   11,503.56x = 132,447,585.52
5. Step 5: Solve for x
   x = 132,447,585.52/11,503.56
6. Step 6: Final answer
   x = 11,513.62