Finding the Fourth Proportional to 12,388.91, 17,097.21 and 7,083.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.91 : 17,097.21 = 7,083.72 : x
2. Step 2: Convert to fraction form
   12,388.91/17,097.21 = 7,083.72/x
3. Step 3: Cross multiply
   12,388.91x = 17,097.21 × 7,083.72
4. Step 4: Simplify right side
   12,388.91x = 121,111,813.00
5. Step 5: Solve for x
   x = 121,111,813.00/12,388.91
6. Step 6: Final answer
   x = 9,775.83