Finding the Fourth Proportional to 13,330.22, 18,395.85 and 7,667.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,330.22 : 18,395.85 = 7,667.78 : x
2. Step 2: Convert to fraction form
   13,330.22/18,395.85 = 7,667.78/x
3. Step 3: Cross multiply
   13,330.22x = 18,395.85 × 7,667.78
4. Step 4: Simplify right side
   13,330.22x = 141,055,330.71
5. Step 5: Solve for x
   x = 141,055,330.71/13,330.22
6. Step 6: Final answer
   x = 10,581.62