Finding the Fourth Proportional to 13,128.18, 18,114.75 and 7,823.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.18 : 18,114.75 = 7,823.22 : x
2. Step 2: Convert to fraction form
   13,128.18/18,114.75 = 7,823.22/x
3. Step 3: Cross multiply
   13,128.18x = 18,114.75 × 7,823.22
4. Step 4: Simplify right side
   13,128.18x = 141,715,674.50
5. Step 5: Solve for x
   x = 141,715,674.50/13,128.18
6. Step 6: Final answer
   x = 10,794.77