Finding the Fourth Proportional to 13,667.11, 20,503.54 and 7,746.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.11 : 20,503.54 = 7,746.83 : x
2. Step 2: Convert to fraction form
   13,667.11/20,503.54 = 7,746.83/x
3. Step 3: Cross multiply
   13,667.11x = 20,503.54 × 7,746.83
4. Step 4: Simplify right side
   13,667.11x = 158,837,316.89
5. Step 5: Solve for x
   x = 158,837,316.89/13,667.11
6. Step 6: Final answer
   x = 11,621.87