Finding the Fourth Proportional to 7,111.34, 10,667.55 and 5,447.87

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.34 : 10,667.55 = 5,447.87 : x
2. Step 2: Convert to fraction form
   7,111.34/10,667.55 = 5,447.87/x
3. Step 3: Cross multiply
   7,111.34x = 10,667.55 × 5,447.87
4. Step 4: Simplify right side
   7,111.34x = 58,115,425.62
5. Step 5: Solve for x
   x = 58,115,425.62/7,111.34
6. Step 6: Final answer
   x = 8,172.22