Finding the Fourth Proportional to 12,788.23, 17,648.06 and 7,123.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.23 : 17,648.06 = 7,123.36 : x
2. Step 2: Convert to fraction form
   12,788.23/17,648.06 = 7,123.36/x
3. Step 3: Cross multiply
   12,788.23x = 17,648.06 × 7,123.36
4. Step 4: Simplify right side
   12,788.23x = 125,713,478.10
5. Step 5: Solve for x
   x = 125,713,478.10/12,788.23
6. Step 6: Final answer
   x = 9,830.41