Finding the Fourth Proportional to 11,880.54, 16,396.29 and 7,164.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,880.54 : 16,396.29 = 7,164.72 : x
2. Step 2: Convert to fraction form
   11,880.54/16,396.29 = 7,164.72/x
3. Step 3: Cross multiply
   11,880.54x = 16,396.29 × 7,164.72
4. Step 4: Simplify right side
   11,880.54x = 117,474,826.89
5. Step 5: Solve for x
   x = 117,474,826.89/11,880.54
6. Step 6: Final answer
   x = 9,888.00