Finding the Fourth Proportional to 13,308.15, 18,366.17 and 7,719.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.15 : 18,366.17 = 7,719.15 : x
2. Step 2: Convert to fraction form
   13,308.15/18,366.17 = 7,719.15/x
3. Step 3: Cross multiply
   13,308.15x = 18,366.17 × 7,719.15
4. Step 4: Simplify right side
   13,308.15x = 141,771,251.43
5. Step 5: Solve for x
   x = 141,771,251.43/13,308.15
6. Step 6: Final answer
   x = 10,652.96