Finding the Fourth Proportional to 13,656.67, 18,846.41 and 7,688.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,656.67 : 18,846.41 = 7,688.32 : x
2. Step 2: Convert to fraction form
   13,656.67/18,846.41 = 7,688.32/x
3. Step 3: Cross multiply
   13,656.67x = 18,846.41 × 7,688.32
4. Step 4: Simplify right side
   13,656.67x = 144,897,145.37
5. Step 5: Solve for x
   x = 144,897,145.37/13,656.67
6. Step 6: Final answer
   x = 10,609.99