Finding the Fourth Proportional to 13,667.10, 18,860.68 and 7,698.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.10 : 18,860.68 = 7,698.86 : x
2. Step 2: Convert to fraction form
   13,667.10/18,860.68 = 7,698.86/x
3. Step 3: Cross multiply
   13,667.10x = 18,860.68 × 7,698.86
4. Step 4: Simplify right side
   13,667.10x = 145,205,734.82
5. Step 5: Solve for x
   x = 145,205,734.82/13,667.10
6. Step 6: Final answer
   x = 10,624.47