Finding the Fourth Proportional to 12,693.69, 17,518.28 and 7,317.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.69 : 17,518.28 = 7,317.81 : x
2. Step 2: Convert to fraction form
   12,693.69/17,518.28 = 7,317.81/x
3. Step 3: Cross multiply
   12,693.69x = 17,518.28 × 7,317.81
4. Step 4: Simplify right side
   12,693.69x = 128,195,407.98
5. Step 5: Solve for x
   x = 128,195,407.98/12,693.69
6. Step 6: Final answer
   x = 10,099.14