Finding the Fourth Proportional to 13,267.57, 18,308.72 and 7,816.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,267.57 : 18,308.72 = 7,816.59 : x
2. Step 2: Convert to fraction form
   13,267.57/18,308.72 = 7,816.59/x
3. Step 3: Cross multiply
   13,267.57x = 18,308.72 × 7,816.59
4. Step 4: Simplify right side
   13,267.57x = 143,111,740.47
5. Step 5: Solve for x
   x = 143,111,740.47/13,267.57
6. Step 6: Final answer
   x = 10,786.58