Finding the Fourth Proportional to 9,880.91, 13,635.76 and 5,404.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.91 : 13,635.76 = 5,404.56 : x
2. Step 2: Convert to fraction form
   9,880.91/13,635.76 = 5,404.56/x
3. Step 3: Cross multiply
   9,880.91x = 13,635.76 × 5,404.56
4. Step 4: Simplify right side
   9,880.91x = 73,695,286.08
5. Step 5: Solve for x
   x = 73,695,286.08/9,880.91
6. Step 6: Final answer
   x = 7,458.35