Finding the Fourth Proportional to 9,727.18, 13,477.72 and 9,516.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,727.18 : 13,477.72 = 9,516.98 : x
2. Step 2: Convert to fraction form
   9,727.18/13,477.72 = 9,516.98/x
3. Step 3: Cross multiply
   9,727.18x = 13,477.72 × 9,516.98
4. Step 4: Simplify right side
   9,727.18x = 128,267,201.59
5. Step 5: Solve for x
   x = 128,267,201.59/9,727.18
6. Step 6: Final answer
   x = 13,186.48