Finding the Fourth Proportional to 12,554.84, 17,337.30 and 9,405.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,554.84 : 17,337.30 = 9,405.56 : x
2. Step 2: Convert to fraction form
   12,554.84/17,337.30 = 9,405.56/x
3. Step 3: Cross multiply
   12,554.84x = 17,337.30 × 9,405.56
4. Step 4: Simplify right side
   12,554.84x = 163,067,015.39
5. Step 5: Solve for x
   x = 163,067,015.39/12,554.84
6. Step 6: Final answer
   x = 12,988.38