Finding the Fourth Proportional to 15,300.48, 21,115.74 and 8,494.86

Step by Step Solution

1. Step 1: Write the proportion equation
   15,300.48 : 21,115.74 = 8,494.86 : x
2. Step 2: Convert to fraction form
   15,300.48/21,115.74 = 8,494.86/x
3. Step 3: Cross multiply
   15,300.48x = 21,115.74 × 8,494.86
4. Step 4: Simplify right side
   15,300.48x = 179,375,255.10
5. Step 5: Solve for x
   x = 179,375,255.10/15,300.48
6. Step 6: Final answer
   x = 11,723.51