Finding the Fourth Proportional to 12,386.86, 17,093.72 and 7,009.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.86 : 17,093.72 = 7,009.20 : x
2. Step 2: Convert to fraction form
   12,386.86/17,093.72 = 7,009.20/x
3. Step 3: Cross multiply
   12,386.86x = 17,093.72 × 7,009.20
4. Step 4: Simplify right side
   12,386.86x = 119,813,302.22
5. Step 5: Solve for x
   x = 119,813,302.22/12,386.86
6. Step 6: Final answer
   x = 9,672.61