Finding the Fourth Proportional to 13,969.56, 19,277.28 and 7,680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,969.56 : 19,277.28 = 7,680.72 : x
2. Step 2: Convert to fraction form
   13,969.56/19,277.28 = 7,680.72/x
3. Step 3: Cross multiply
   13,969.56x = 19,277.28 × 7,680.72
4. Step 4: Simplify right side
   13,969.56x = 148,063,390.04
5. Step 5: Solve for x
   x = 148,063,390.04/13,969.56
6. Step 6: Final answer
   x = 10,599.00