Finding the Fourth Proportional to 12,789.96, 17,648.88 and 9,434.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.96 : 17,648.88 = 9,434.58 : x
2. Step 2: Convert to fraction form
   12,789.96/17,648.88 = 9,434.58/x
3. Step 3: Cross multiply
   12,789.96x = 17,648.88 × 9,434.58
4. Step 4: Simplify right side
   12,789.96x = 166,509,770.27
5. Step 5: Solve for x
   x = 166,509,770.27/12,789.96
6. Step 6: Final answer
   x = 13,018.79