Finding the Fourth Proportional to 9,880.59, 13,635.56 and 5,404.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.59 : 13,635.56 = 5,404.62 : x
2. Step 2: Convert to fraction form
   9,880.59/13,635.56 = 5,404.62/x
3. Step 3: Cross multiply
   9,880.59x = 13,635.56 × 5,404.62
4. Step 4: Simplify right side
   9,880.59x = 73,694,993.26
5. Step 5: Solve for x
   x = 73,694,993.26/9,880.59
6. Step 6: Final answer
   x = 7,458.56