Finding the Fourth Proportional to 12,699.46, 17,516.28 and 10,928.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.46 : 17,516.28 = 10,928.02 : x
2. Step 2: Convert to fraction form
   12,699.46/17,516.28 = 10,928.02/x
3. Step 3: Cross multiply
   12,699.46x = 17,516.28 × 10,928.02
4. Step 4: Simplify right side
   12,699.46x = 191,418,258.17
5. Step 5: Solve for x
   x = 191,418,258.17/12,699.46
6. Step 6: Final answer
   x = 15,072.94