Finding the Fourth Proportional to 15,613.94, 21,546.06 and 8,540.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,613.94 : 21,546.06 = 8,540.12 : x
2. Step 2: Convert to fraction form
   15,613.94/21,546.06 = 8,540.12/x
3. Step 3: Cross multiply
   15,613.94x = 21,546.06 × 8,540.12
4. Step 4: Simplify right side
   15,613.94x = 184,005,937.93
5. Step 5: Solve for x
   x = 184,005,937.93/15,613.94
6. Step 6: Final answer
   x = 11,784.72