Finding the Fourth Proportional to 9,880.65, 13,635.61 and 5,404.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.65 : 13,635.61 = 5,404.52 : x
2. Step 2: Convert to fraction form
   9,880.65/13,635.61 = 5,404.52/x
3. Step 3: Cross multiply
   9,880.65x = 13,635.61 × 5,404.52
4. Step 4: Simplify right side
   9,880.65x = 73,693,947.53
5. Step 5: Solve for x
   x = 73,693,947.53/9,880.65
6. Step 6: Final answer
   x = 7,458.41