Finding the Fourth Proportional to 12,789.14, 17,647.89 and 7,123.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.14 : 17,647.89 = 7,123.46 : x
2. Step 2: Convert to fraction form
   12,789.14/17,647.89 = 7,123.46/x
3. Step 3: Cross multiply
   12,789.14x = 17,647.89 × 7,123.46
4. Step 4: Simplify right side
   12,789.14x = 125,714,038.50
5. Step 5: Solve for x
   x = 125,714,038.50/12,789.14
6. Step 6: Final answer
   x = 9,829.75