Finding the Fourth Proportional to 15,404.42, 21,258.27 and 9,034.78

Step by Step Solution

1. Step 1: Write the proportion equation
   15,404.42 : 21,258.27 = 9,034.78 : x
2. Step 2: Convert to fraction form
   15,404.42/21,258.27 = 9,034.78/x
3. Step 3: Cross multiply
   15,404.42x = 21,258.27 × 9,034.78
4. Step 4: Simplify right side
   15,404.42x = 192,063,852.21
5. Step 5: Solve for x
   x = 192,063,852.21/15,404.42
6. Step 6: Final answer
   x = 12,468.10