Finding the Fourth Proportional to 15,476.15, 21,356.78 and 9,103.43

Step by Step Solution

1. Step 1: Write the proportion equation
   15,476.15 : 21,356.78 = 9,103.43 : x
2. Step 2: Convert to fraction form
   15,476.15/21,356.78 = 9,103.43/x
3. Step 3: Cross multiply
   15,476.15x = 21,356.78 × 9,103.43
4. Step 4: Simplify right side
   15,476.15x = 194,419,799.45
5. Step 5: Solve for x
   x = 194,419,799.45/15,476.15
6. Step 6: Final answer
   x = 12,562.55