Finding the Fourth Proportional to 13,148.33, 18,139.98 and 7,769.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.33 : 18,139.98 = 7,769.62 : x
2. Step 2: Convert to fraction form
   13,148.33/18,139.98 = 7,769.62/x
3. Step 3: Cross multiply
   13,148.33x = 18,139.98 × 7,769.62
4. Step 4: Simplify right side
   13,148.33x = 140,940,803.22
5. Step 5: Solve for x
   x = 140,940,803.22/13,148.33
6. Step 6: Final answer
   x = 10,719.30