Finding the Fourth Proportional to 13,395.36, 18,486.72 and 7,806.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,395.36 : 18,486.72 = 7,806.72 : x
2. Step 2: Convert to fraction form
   13,395.36/18,486.72 = 7,806.72/x
3. Step 3: Cross multiply
   13,395.36x = 18,486.72 × 7,806.72
4. Step 4: Simplify right side
   13,395.36x = 144,320,646.76
5. Step 5: Solve for x
   x = 144,320,646.76/13,395.36
6. Step 6: Final answer
   x = 10,773.93