Finding the Fourth Proportional to 13,655.39, 18,844.22 and 7,687.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,655.39 : 18,844.22 = 7,687.04 : x
2. Step 2: Convert to fraction form
   13,655.39/18,844.22 = 7,687.04/x
3. Step 3: Cross multiply
   13,655.39x = 18,844.22 × 7,687.04
4. Step 4: Simplify right side
   13,655.39x = 144,856,178.69
5. Step 5: Solve for x
   x = 144,856,178.69/13,655.39
6. Step 6: Final answer
   x = 10,607.99