Finding the Fourth Proportional to 12,388.76, 17,097.38 and 7,085.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.76 : 17,097.38 = 7,085.24 : x
2. Step 2: Convert to fraction form
   12,388.76/17,097.38 = 7,085.24/x
3. Step 3: Cross multiply
   12,388.76x = 17,097.38 × 7,085.24
4. Step 4: Simplify right side
   12,388.76x = 121,139,040.67
5. Step 5: Solve for x
   x = 121,139,040.67/12,388.76
6. Step 6: Final answer
   x = 9,778.14