Finding the Fourth Proportional to 9,935.20, 13,709.76 and 5,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,935.20 : 13,709.76 = 5,458.72 : x
2. Step 2: Convert to fraction form
   9,935.20/13,709.76 = 5,458.72/x
3. Step 3: Cross multiply
   9,935.20x = 13,709.76 × 5,458.72
4. Step 4: Simplify right side
   9,935.20x = 74,837,741.11
5. Step 5: Solve for x
   x = 74,837,741.11/9,935.20
6. Step 6: Final answer
   x = 7,532.59