Finding the Fourth Proportional to 10,969.56, 15,121.83 and 7,772.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,969.56 : 15,121.83 = 7,772.98 : x
2. Step 2: Convert to fraction form
   10,969.56/15,121.83 = 7,772.98/x
3. Step 3: Cross multiply
   10,969.56x = 15,121.83 × 7,772.98
4. Step 4: Simplify right side
   10,969.56x = 117,541,682.15
5. Step 5: Solve for x
   x = 117,541,682.15/10,969.56
6. Step 6: Final answer
   x = 10,715.26